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>