Fix spelling errors in comments, docstrings, and UI widget names

[mr-raj12]

Summary

Several spelling errors exist in comments, docstrings, and a UI widget name across the codebase. These were identified using codespell.

Affected Files

File	Line	Typo	Fix
src/vorta/profile_export.py	103	incase	in case
src/vorta/assets/UI/about_tab.ui	121, 226	seperator (widget name)	separator
src/vorta/borg/info_archive.py	49	incase	in case
src/vorta/views/archive_tab.py	1048	everytime	every time
src/vorta/views/partials/treemodel.py	415	wont	won't
src/vorta/views/partials/treemodel.py	565	posess	possess

Notes

• The seperator fix in about_tab.ui is a widget name attribute, not referenced anywhere in Python code, so renaming is safe.
• Two codespell false positives were excluded:
  • tray_menu.py:39 — DoubleClick is a PyQt6 enum value (QSystemTrayIcon.ActivationReason.DoubleClick)
  • tests/unit/test_utils.py:118 — caf is part of the Unicode string café in a path normalization test

[m3nu]

Since this is a trivial change, why don't you do a pull request right away?

[mr-raj12]

Thanks @m3nu , I wanted this issue to be approved. I have things ready in my local , will raise expected PR by 4:30PM IST (as currently in a class 🙂‍↕️).