[Investigate] Remove SelectableText in favor of SelectionArea?

[erickok]

We should investigate if we can simplify our support for selectable text by removing the usage of SelectableText (which has limitations and behaviour differences) in favor of simply wrapping (even even just recommending) SelectableArea SelectionArea, introduced in Flutter 3.3.

Of course the text selection needs to be as least as good (in behaviour and features) as what we have right now. It could simplify our code though and remove the need to document limitations when using SelectableHtml.

Additional context
https://api.flutter.dev/flutter/material/SelectionArea-class.html for the official doc.

[erickok]

A very quick try, wrapping the example app in SelectableArea and building to web with canvaskit, worked really well. Even table inside tables was selecting how you'd intuitively expect.

[Sub6Resources]

That API definitely looks neat. I'll give it a try myself later today! I think if we can remove the burden of Selection logic from our library as much as possible, that would be best.

[asmith20002]

I've tried it briefly and it looks like it gets the job done :)

btw it is SelectionArea, not SelectableArea (the api document link is correct though)

[windows7lake]

3.0.0 is not supported with SelectionArea .
Caused by fix: Fix issue with font scaling introduced in 3.0.0-alpha.6 (#1173).