Add tree_view for viewing Profile.print

[IanButterworth]

Reads in the output of Profile.print() and turns it into an expandable treeview, with cursor controls.
click expander icon or spacebar on selected row to expand/collapse, click row or return key on selected row to edit.

A probably better and less brittle implementation would be to use the same read mechanism as ProfileView.view, but this was quite easy (and fun) to build and it maintains the styling of Profile.print which is nicely consistent.

julia> ProfileView.view_tree()

Screen.Recording.2025-05-30.at.5.17.59.PM.mov

[timholy]

@copilot resolve the merge conflicts in this pull request

[Copilot]

@copilot resolve the merge conflicts in this pull request

Resolved. The merge conflicts in Project.toml have been fixed — keeping version 1.10.3 and updating the Cthulhu compat to "2, 3" from master. All other files merged cleanly. Merge commit: 4171d8b.

[timholy]

Seems OK to me; it's legit to parse the printed output, though the alternative would also have been legit.

It does lack tests, but perhaps that's OK for a GUI package. Merge at will.