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/style.css

@@ -20,3 +20,11 @@ window#waybar {
 #clock, #battery, #network, #pulseaudio {
   padding: 0 12px;
 }
+
+#battery.warning {
+  color: #f0c674;
+}
+
+#battery.critical {
+  color: #cc6666;
+}