feat(waybar): island floating 3-pills + popups + deploy

- Config waybar 3-pills glassmorphism (left/center/right)
- Scripts : gpu, network, power-profile (toggle+luminosité/profil),
  cava daemon+reader, wob (volume/luminosité), rofi-launcher
- Popup media GTK3 : volume sortie+entrée + luminosité (vc-media-popup.py)
- Profil énergie : cycle balanced→low-power→performance avec brightnessctl
- Autostart COSMIC : waybar.desktop + wob.desktop
- Thème COSMIC Light ajouté (accent violet-chaton)
- deploy : +autostart, +sudoers platform_profile, +udev platform_profile,
  +scripts .py waybar, +CosmicTheme.Light

INSTALL/configs/waybar/cava-waybar.cfg

@@ -0,0 +1,18 @@
+[general]
+bars = 8
+framerate = 30
+
+[input]
+method = pulse
+source = auto
+
+[output]
+method = raw
+raw_target = /dev/stdout
+data_format = ascii
+ascii_max_range = 8
+bar_delimiter = 59
+
+[smoothing]
+gravity = 100
+noise_reduction = 77