v1.1.1

Rename user-facing app identity to google-notes-app / "Notes App"

The Google OAuth branding page cannot use "Google" in the app name, so
the consent screen is branded "Notes App". Align everything the user
sees with that: executable, desktop file, icon name, window title,
install paths, package name, and docs. Set the X11 class name and
Wayland app id to google-notes-app so the running window is matched to
the installed .desktop entry and shows the same icon as the consent
screen. Internal code identifiers (GoogleTasksImGui project name etc.)
are unchanged. Bump version to 1.1.1.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

v1.1.0

Add app icons (LFS), desktop entry, and desktop integration packaging

- Extract Google Notes icon set into assets/icons, tracked via Git LFS
- Add google-tasks-imgui.desktop launcher entry
- Install desktop file and hicolor icons (64/256/512) via CMake, so
  DEB/RPM/TGZ packages pick them up through CPack
- Fetch LFS objects (and install git-lfs) in the release workflow so
  packages ship real PNGs, not LFS pointers
- Bump version to 1.1.0

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

v1.0.0

Mark pre-purge verification gate as passed in plan

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>