Publish Codelab/s for Codelab Tools

[vorburger]

The https://github.com/googlecodelabs/tools/tree/main/sample, respectively a future cleaned up version of it, should ideally probably be continously rebuilt with the latest claat (see #862) and the result published somewhere? That could IMHO make this wonderful project easier to comprehend than the current very long README... 😄

https://github.com/googlecodelabs/tools/tree/main/sample/codelab-4-codelab-markdown is not easy to directly render from GitHub (https://googlecodelabs.github.io/tools/sample/codelab-4-codelab-markdown/ doesn't work).

Would it be feasible to get this onto https://codelabs.developers.google.com itself? (After I clean it up a bit.) Or is that No Go? If yes, where is the "source" of what's published there - public, or Google internal?

PS: Apparently sampe/codelab.md originated at https://github.com/Mrc0113/codelab-4-codelab and ended up here in #325. Its https://www.marcd.dev/codelab-4-codelab/ is not working anymore (see #869 for a refresh to fix it here). Perhaps it could be removed from there to avoid future confusion; I'll raise a PR there.