docs: baseline all the templated markdown docs (#78)

CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, sex characteristics, gender identity and expression,
+level of experience, education, socio-economic status, nationality, personal
+appearance, race, religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+- The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at [email protected]. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+[homepage]: https://www.contributor-covenant.org

ISSUE_TEMPLATE.md

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+<!--
+If this is a feature request, make sure you search Issues for an existing request before creating a new one!
+-->
+
+### Issue Summary
+A summary of the issue and the environment in which it occurs. If suitable, include the steps required to reproduce the bug. Please feel free to include screenshots, screencasts, or code examples.
+
+### Steps to Reproduce
+1. This is the first step
+2. This is the second step
+3. Further steps, etc.
+
+### Code Snippet
+```node
+# paste code here
+```
+
+### Exception/Log
+```
+# paste exception/log here
+```
+
+### Technical details:
+* twilio-cli-core version:
+* node version:
+

LICENSE.md

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+MIT License
+
+Copyright (C) 2020, Twilio, Inc. <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
+of the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

PULL_REQUEST_TEMPLATE.md

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+<!--
+We appreciate the effort for this pull request but before that please make sure you read the contribution guidelines, then fill out the blanks below.
+
+Please format the PR title appropriately based on the type of change:
+  <type>[!]: <description>
+Where <type> is one of: docs, chore, feat, fix, test.
+Add a '!' after the type for breaking changes (e.g. feat!: new breaking feature).
+
+**All third-party contributors acknowledge that any contributions they provide will be made under the same open-source license that the open-source project is provided under.**
+
+Please enter each Issue number you are resolving in your PR after one of the following words [Fixes, Closes, Resolves]. This will auto-link these issues and close them when this PR is merged!
+e.g.
+Fixes #1
+Closes #2
+-->
+
+# Fixes #
+
+A short description of what this PR does.
+
+### Checklist
+- [ ] I acknowledge that all my contributions will be made under the project's license
+- [ ] I have made a material change to the repo (functionality, testing, spelling, grammar)
+- [ ] I have read the [Contribution Guidelines](CONTRIBUTING.md) and my PR follows them
+- [ ] I have titled the PR appropriately
+- [ ] I have updated my branch with the master branch
+- [ ] I have added tests that prove my fix is effective or that my feature works
+- [ ] I have added necessary documentation about the functionality in the appropriate .md file
+- [ ] I have added inline documentation to the code I modified
+
+If you have questions, please file a [support ticket](https://twilio.com/help/contact), or create a GitHub Issue in this repository.