Add example app

[jemishavasoya]

added simple example app for it that demonstrates

[css_color] Add example app #136217
#136217

added Example app

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read and followed the [relevant style guides] and ran the auto-formatter. (Unlike the flutter/flutter repo, the flutter/packages repo does use dart format.)
• I signed the CLA.
• The title of the PR starts with the name of the package surrounded by square brackets, e.g. [shared_preferences]
• I listed at least one issue that this PR fixes in the description above.
• I updated pubspec.yaml with an appropriate new version according to the [pub versioning philosophy], or this PR is [exempt from version changes].
• I updated CHANGELOG.md to add a description of the change, [following repository CHANGELOG style].
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or this PR is [test-exempt].
• All existing and new tests are passing.

[stuartmorgan-g]

• All existing and new tests are passing.

Since a large number of CI checks are failing, I'm assuming this is a work in progress, and marking it as a Draft accordingly, Please mark it as ready for review once it's passing.

[stuartmorgan-g]

[css_color] Add example app #136217
#136217

The referenced issue is about a completely different package.

What's the goal of adding this example app? It's not clear to me what this is accomplishing that the README doesn't (and/or than a simple example.md wouldn't do). We don't need integration tests, for instance.

[camsim99]

@jemishavasoya when you get a chance, can you clarify the goal of adding this example? Converting to a draft in the meantime to remove this from our queue.

[goderbauer]

(triage): @jemishavasoya Do you still have plans to get back to this PR in the near future to address the feedback given above?

[stuartmorgan-g]

Since this is marked as a draft and hasn't been updated in several months I'm going to close it to clean out our review queue. Please don't hesitate to submit a new PR if you decide to revisit this. Thanks!