``tkinter.text`` is not documented

[sharktide]

Documentation

Me and @ZeroIntensity noticed that tkinter.Text doesn't currently have a dedicated section in the tkinter documentation, despite being one of the more powerful and flexible widgets.

Since Text supports rich features like tags, marks, embedded widgets, and undo/redo, it seems like a good candidate for a focused documentation page or section (similar to other widgets like Button or Canvas). I’d be happy to help contribute a first pass at this if that would be useful.

(This is so short because I don't think I have to write more for people to understand this issue. :)

[sharktide]

This was noticed while @ZeroIntensity was reviewing PR #130848