Improve package:genui pub score.

[ditman]

Description

Added some dart documentation and an example directory to improve package:genui pub score.

• Fixes Get Points to 160/160 up 10 points from present #628
• Closes Should Move project to 160 of 160 points - uses simple_chat as project example. #629, addressing @jacobsimionato's comments there.

Pre-launch Checklist

• I read the Flutter Style Guide recently, and have followed its advice.
• I signed the CLA.
• I read the Contributors Guide.
• I have added sample code updates to the changelog.
• I updated/added relevant documentation (doc comments with ///).

If you need help, consider asking for advice on the #hackers-devrel channel on Discord.

[ditman]

Apologies @hunterino, I didn't have permissions to push to your original PR, so I had to create a new one. I'm doing this to preserve the authorship of your commits as much as possible!

[gemini-code-assist]

Code Review

This pull request significantly improves the project's documentation and developer experience by adding a comprehensive set of examples and extensive Dart documentation for various classes and methods. The new examples directory and its detailed README.md are excellent additions. My review includes a couple of suggestions to enhance the clarity of the changelog and the safety of the setup instructions in the example's README.

[ditman]

PTAL @jacobsimionato, I moved content from the big examples/README.md to each separate app, and left the global one as the index.

So after this lands, pub.dev for package:genui will render a README that tells you to find the actual README in the examples directory from the repo, and that one will point you to each specific example.

I'd love the one from pub to just be the same as the one in examples (but I don't want to mess with symlinks, which I'm not sure would work!)

[jacobsimionato]

Awesome!