Update readmes to provide successful build instructions

[chacebot]

1. Updates CONTRIBUTING.md to use build script to test setup
2. Adds link to CONTRIBUTING.md from base readme

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Test A
• Test B

Checklist:

• Each of my commits contains one meaningful change
• I have performed rebase of my branch on top of the development
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

[zeibura]

Please undo the readme update - for one thing the readme also displays on the VS Code Marketplace as well as on Github and the relative link to contributing.md won't do anything there. To contributors already at github reading contributing.md for such info is standard practice.

There is a lot of out of date stuff in that contributing.md file (all references to Che4z should be removed for a start and the contact email at the end is wrong). In the intro to the readme itself there is still a link to the obsolete Che4z repo which can be removed. If you undo the commit to the readme I can prepare a readme update on another branch (I can't make one to this branch as it's on your fork)

[chacebot]

@zeibura Thank you for your input. Understood. The readme changes have been removed from this PR.

[zeibura]

Thanks! Readme update is here: #2410