[camera_web] Re: Support for camera stream on web

[TecHaxter]

This PR aims to provide support for strartImageStream and stopImageStream on Web.

#92460

Based on #6944 from the archived plugins repository

Pre-launch Checklist

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

POV: my first PR on a public repo Contains required commits from the PR https://github.com/flutter/packages/pull/6443, resolves unnecessary 202 commits

[ditman]

I'll re-review this tomorrow!

[TecHaxter]

Hi @ditman The PR is ready for another review, Thanks :)

[stuartmorgan-g]

From triage: Ping @ditman on this re-review.

[stuartmorgan-g]

Update from triage: we're working through trying to find a web reviewer with availability to look at this. Apologies for the delay.

[Piinks]

@yjbanov can you suggest a reviewer for this change? It has been blocked on a web review.

[mdebbar]

/gemini review

[stuartmorgan-g]

From triage: @mdebbar What's the status of the web review here?

[stuartmorgan-g]

From triage: @mdebbar This looks to be ready for re-review.