* fix: lock buttons at dialog bottom
The previous implementation appended the buttons to the RecyclerView programmatically
this disabled the scroll and pushed the buttons outside the visible dialog area
if too there were too many playlists.
To fix this now the XML defines a fixed location for the buttons, enabling
the scroll of the RecyclerView and preventing the buttons to become unreachable
* feat: improve playlist chooser dialog UI
Implement it in the XML layout and not programmatically.
* fix: detached listeners from XML layout
* fix: missing dialog title
Introduces a new app widget for music playback control and display. Adds widget provider classes, update manager, view factory, and related resources (layouts, colors, strings, XML). Integrates widget updates with MediaService to reflect current playback state. Updates AndroidManifest to register the widget.
