Add TOML config, playerctl dep, and media button defaults; bump to v1.1.0

- Switch config format from JSON to TOML (tomllib built-in on 3.11+,
  tomli fallback for 3.10) so the generated config can include comments
- Write an annotated config.toml on first run with descriptions for every
  knob/button and hints for all available actions
- Promote playerctl from optdepends to depends so media buttons work
  out of the box
- Default buttons 1–3 now pre-configured for playerctl previous/play-pause/next
- Rename contrib/config.example.json → config.example.toml with full
  TOML rewrite including per-knob LED colour override examples
- Log a migration hint when a legacy config.json is detected

.SRCINFO

@@ -1,6 +1,6 @@
 pkgbase = turn-up-arch
 	pkgdesc = USB serial knob/button mixer daemon for PipeWire/PulseAudio on Linux
-	pkgver = 1.0.0
+	pkgver = 1.1.0
 	pkgrel = 1
 	url = https://github.com/sean351/turn-up-arch
 	arch = any
@@ -13,10 +13,10 @@ pkgbase = turn-up-arch
 	depends = python-pyserial
 	depends = python-pulsectl
 	depends = pipewire-pulse
-	optdepends = playerctl: media key support via button commands
+	depends = playerctl
 	optdepends = pulseaudio: alternative to pipewire-pulse
 	install = turnupd.install
-	source = turn-up-arch-1.0.0.tar.gz::https://github.com/sean351/turn-up-arch/archive/refs/tags/v1.0.0.tar.gz
+	source = turn-up-arch-1.1.0.tar.gz::https://github.com/sean351/turn-up-arch/archive/refs/tags/v1.1.0.tar.gz
 	sha256sums = SKIP
 
 pkgname = turn-up-arch