Add key contexts for Pickers (#35665)
Closes: https://github.com/zed-industries/zed/issues/35430
Added:
- Workspace > CommandPalette
- Workspace > GitBranchSelector
- Workspace > GitRepositorySelector
- Workspace > RecentProjects
- Workspace > LanguageSelector
- Workspace > IconThemeSelector
- Workspace > ThemeSelector
Release Notes:
- Added new keymap contexts for various Pickers - CommandPalette,
GitBranchSelector, GitRepositorySelector, RecentProjects,
LanguageSelector, IconThemeSelector, ThemeSelector