Add code structure and a few other links to CONTRIBUTING.md

[larryliu0820]

As titled. This PR mainly adds the mapping between our code structure to the documentations/tutorials. Also a few other touch-ups.

cc @mergennachin @byjlw

[pytorch-bot]

🔗 Helpful Links

🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/9793

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✅ You can merge normally! (1 Unrelated Failure)

As of commit 86d3ba8 with merge base 7d35c68 ():

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / test-models-linux-basic (mv3, portable, buck2, linux.2xlarge, executorch-ubuntu-22.04-clang12) / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128

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[larryliu0820]

@mergennachin merged, thanks to AI coding tool :)

[byjlw]

I think we'll get more contributors if we take the hand-holding approach lightning took with screenshots and such.

Thinking people contributing to open source for the very first time.

Seasoned contributors can breeze right on by.

We could even have a section "beginnings guide to open source contributions"
some people may have years of development experience but are using git for the very first time

https://devblog.pytorchlightning.ai/quick-contribution-guide-86d977171b3a

[larryliu0820]

I think we'll get more contributors if we take the hand-holding approach lightning took with screenshots and such.

Thinking people contributing to open source for the very first time.

Seasoned contributors can breeze right on by.

We could even have a section "beginnings guide to open source contributions" some people may have years of development experience but are using git for the very first time

https://devblog.pytorchlightning.ai/quick-contribution-guide-86d977171b3a

Thanks for the link, it's inspiring. I can try to add something similar

[larryliu0820]

@pytorchbot cherry-pick --onto release/0.6 -c docs

[larryliu0820]

@pytorchbot cherry-pick --onto release/0.6 -c docs

[pytorchbot]

Cherry picking #9793

The cherry pick PR is at #9962 The following tracker issues are updated:

• [v0.6.0] Release Tracker #9253 (comment)

Details for Dev Infra team

Raised by workflow job