Add charging indicator and pacman package, bump to 1.1.0

- Show charge/discharge power in watts, a battery graphic with charge
  bolt, a power history graph and the estimated time until full or
  remaining (respecting the 80 % charge limit) in the app, the panel
  widget, its tooltip and `predatorctl status`
- Add packaging/arch/PKGBUILD that builds a pacman package; the kernel
  module ships as DKMS source and is rebuilt for every kernel
- Bump version to 1.1.0

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

predator_control/__init__.py

@@ -2,7 +2,7 @@
 
 import os
 
-__version__ = "1.0.0"
+__version__ = "1.1.0"
 
 APP_NAME = "Predator Control"
 RUN_DIR = os.environ.get("PREDATOR_CONTROL_RUN_DIR", "/run/predator-control")