feat(queue): add multi-select and bulk actions to queue (#2839)

* feat(queue): add multi-select and bulk actions to queue

- Add selection mode to PlayerQueue with long-press to select
- Disable inner navigation (title/artist) when selecting via TrackTile
- Show checkboxes only in selection mode
- Add selection AppBar behavior and bottom-sheet menu with: Select all, Add to playlist, Remove selected, Cancel
- Reuse existing PlaylistAddTrackDialog for bulk add
- Hide drag handle while in selection mode

Closes: # (implement multi-select queue feature)

* chore: update .gitignore to include .vscode and modify signing configurations back to default in build.gradle

* chore: add VS Code configuration files

* chore: update dependencies in pubspec.lock

* chore: update pubspec.lock to reflect dependency changes and version updates

* chore: fix replace material widgets with shadcn widgets

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Co-authored-by: Kingkor Roy Tirtho <krtirtho@gmail.com>