Add support for running Typescript tests directly (without transpiling).

[prudhvi22]

fixes #33

[garg3133]

Actually, this is not what is to be done. Let's break it into a few steps:

• Step 1: When a new TS project is created, we create a new tsconfig.json file for the users (in setupTypeScript() function) where we just copy the TS file already present in assets folder. Instead of this, we should now use tsc --init command to generate a new tsconfig.json file in the root dir.
• Step 2: Coming to the issue raised by Andrei, the first part of it is to allow users to run the ts tests directly instead of compiling them first. For this, we need to do three things:

1. Create a nightwatch/tsconfig.json file (check if nightwach/tsconfig.json or tsconfig.nightwatch.json is not already present) which ts-node will use to transpile ts files before running them. So, this file will contain only the necessary settings. This is not to be generated by using tsc --init but by editing the assets/tsconfig.json file and then copying it to nightwatch. (The code for this will be placed in setupTypescript() itself as it is a part of setting up Typescript.
2. Install ts-node as a devDependency. This is to be done in identifyPackagesToInstall() function itself.
3. Since we no longer require this.otherInfo.tsOutDir now (as we don't need to pre-compile ts test files now before running them), we can safely remove it and make necessary changes at other places accordingly. But this is not an easy task and would need my involvement, so for now instead of reading the outDir property from tsconfig.json file in setupTypescript(), we can just set this.otherInfo.tsOutDir to '' and it should work fine. Just test it out.

• Step 3: Coming to the second part of issue TypeScript setup: move tsconfig.json to nightwatch/tsconfig.json #33, the structure of examples need to be modified as suggested by Andrei. So, if the testsLocation provided by the user is empty or non-existent, you can copy the examples to the testsLocation itself, so that they can be used by user as boilerplate. Otherwise, copy all the examples to nightwatch folder.

[garg3133]

Just a few comments, otherwise looks good to me! You can start working on the examples restructure in a separate branch (created from main branch) as there's a very little conflict, if any, between the two works.

[garg3133]

LGTM!