Add clipboard, idle timeouts, night light, bluetooth, and waybar improvements

- Add cliphist clipboard manager with wofi picker (Mod+Shift+C)
- Add wl-paste watch for clipboard history
- Add swayidle idle timeouts: blank at 5min, lock at 10min
- Add blueman-applet autostart (bluetooth tray)
- Add wlsunset night light for Vancouver (49.2N, 123.1W)
- Add clipboard-picker script and symlink in install.sh
- Waybar: add battery charging format, warning/critical states, tray config
- Waybar CSS: add warning (yellow) and critical (red) battery colors

waybar/config.jsonc

@@ -13,7 +13,17 @@
 
   "battery": {
     "format": "{capacity}% {icon}",
-    "format-icons": ["","","","",""]
+    "format-charging": "{capacity}%  ",
+    "format-plugged": "{capacity}%  ",
+    "format-icons": ["","","","",""],
+    "states": {
+      "warning": 30,
+      "critical": 15
+    }
+  },
+
+  "tray": {
+    "spacing": 8
   },
 
   "network": {