chore(release): 0.1.1

Bump version to 0.1.1 (package.json, Cargo.toml, Cargo.lock), date the
changelog section (2026-06-23), and add the GitHub release-notes draft.

QoL release on top of 0.1.0: custom multi-folder picker, theme system,
timeline scrubber, folder reordering, gallery/duplicate-finder
virtualisation, video playback settings, rebuild-semantic-index action,
plus AVIF thumbnail, video-embedding, and Subtle Light theme fixes.

src-tauri/Cargo.lock

@@ -4595,7 +4595,7 @@ dependencies = [
 
 [[package]]
 name = "phokus"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "anyhow",
  "candle-core",