move(docs/contrib-guidelines): Add contrib guidelines to Maestro

Reformat a bit, removing obsolete bits. Guidelines will need further
work and improvements.

Signed-off-by: Denys Fedoryshchenko <[email protected]>

kernelci.org/content/en/maestro/contrib.md

@@ -0,0 +1,32 @@
+---
+title: "Contributing Guidelines"
+date: 2024-09-12T16:33:00Z
+draft: false
+weight: 2
+---
+
+KernelCI core project is open for contributions. Contributions may consist of
+adding new builds, tests and device types as well as features and bugfixes for
+KernelCI core tools.
+When the PR is created, the [KernelCI staging](https://kernelci.org/docs/instances/staging)
+instance takes care of updating the [staging.kernelci.org branch](https://github.com/kernelci/kernelci-core/tree/staging.kernelci.org).
+In general the branch is updated every 8h and a limited set of builds and tests
+are run on it.
+
+There are several guidelines which can facilitate the PR review process:
+
+1. Make sure the PR is well described
+   1. Describe the purpose of the changes
+   2. Example use cases are welcome
+2. Attach staging build/test results when possible.
+   1. If the PR is expected to produce build/test results
+   check [staging viewer](https://staging.kernelci.org:9000/viewer) and make sure these are mentioned in the PR comment
+      1. Build artifacts including logs are not kept permanently, so it's generally recommended to put them in a place that'd make them last if you want them to be part of the PR. Good way to do that seem to be:
+         * Putting important information such as log fragments in the PR comments
+         * Using services like [pastebin](https://pastebin.com/) to store data important for the PR (e.g. full logs) and pasting the links.
+   2. If the results are not visible on staging and you think they should be, mention it in the comments, too
+   3. If there is specific way to verify PR is working as expected, mention it in the comments
+3. Make sure that reviewers' comments and questions are addressed
+   1. When there are comments unanswered for more than 1 month the PR will be closed
+4. In case there is a need to consult the PR with KernelCI maintainers join the [open hours](https://docs.kernelci.org/org/#open-hours)
+5. Should you need help, you can reach KernelCI [maintainers](/org/maintainers/) or the community on the [KernelCI website](https://kernelci.org/community-contact/)