RFC: Refactor to projen

[pgollucci]

Projen and every other CDK uses projen already.

To Accomplish:

• [ ] Remove lerna
• [ ] Remove yarn.lock s
• [. ] tsconfig.json moves to tsconfig.eslint.json and tsconfig.jest.json
• [ ] Remove package.json s (might keep some fragements)
• [ ] Rename packages to src/
• [ ] Move examples into src/
• [. ] packages/armkit-cli/tests can/should? move to toplevel/test?
• [. ] Move from Azure Pipelines to GitHub Actions (for community visibility of PR builds)
• [ ] Distribute the construct library and the cli as 1 mono pkg like the aws-cdk
• [. ] Enable gitpod, docgen, typedocs? (not codecov), codeql (ts)
• [. ] Enable mergify

In .projenrc.js

• Publish to NPM, PYPI, MAVEN, Github (golang)
• Hook build to run armkit generate which fixes Build fails on initial repo clone #42

If this sounds good, I'll open a PR.

[pgollucci]

@aheumaier @ElYusubov

[github-actions]

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