Straw phase N: share + playback speed + audio-only toggle (v0.1.0-N / vc=2)

Player overlay (top-right) now hosts four buttons in a row:
- Speed: 1× by default; tap opens a dialog of 0.25× / 0.5× / 0.75× / 1× /
  1.25× / 1.5× / 1.75× / 2×. Applies via exoPlayer.playbackParameters.
- Audio-only toggle (📻/📺): toggles Player.TRACK_TYPE_VIDEO via
  TrackSelectionParameters. Saves bandwidth + battery for screen-off
  listening. Toast confirms state.
- Share (↗): Intent.ACTION_SEND with text/plain containing the YouTube
  URL + the video title as EXTRA_SUBJECT. Hands off to Android share
  sheet.
- PiP (⊟): same as M-1 but now part of the row instead of its own
  floating square.

VideoDetail screen: Play button now lives in a Row with an OutlinedButton
"Share" that fires the same ACTION_SEND chooser. Same UX surface for
users who land on detail without going to player.

Version: STRAW_VERSION_CODE 1 → 2, STRAW_VERSION_NAME "0.1.0-day1" →
"0.1.0-N" so the F-Droid client sees this as an upgrade.

Phase O next (per Cobb's "where are all the features"): quality picker,
related videos on detail, download (audio + video).

buildSrc/src/main/kotlin/ProjectConfig.kt

@@ -15,6 +15,6 @@ const val NEWPIPE_APPLICATION_ID_OLD = "org.schabi.newpipe"
 const val NEWPIPE_APPLICATION_ID_NEW = "net.newpipe.app"
 
 // Sulkta fork — Straw
-const val STRAW_VERSION_CODE = 1
-const val STRAW_VERSION_NAME = "0.1.0-day1"
+const val STRAW_VERSION_CODE = 2
+const val STRAW_VERSION_NAME = "0.1.0-N"
 const val STRAW_APPLICATION_ID = "com.sulkta.straw"