Update documentation and PKGBUILD for new features

Update README.md:
- Add comprehensive Key Features section highlighting desktop-agnostic design
- Document plugin system, D-Bus remote control, sleep mode, and self-voicing
- Reorganize dependencies section with clear categories
- Emphasize desktop neutrality and universal compatibility

Update PKGBUILD:
- Bump pkgrel to reflect new features
- Improve package description to highlight desktop-agnostic nature
- Organize dependencies with comments for clarity
- Add optdepends for alternative TTS engines
- Ensure all new dependencies (python-dasbus, python-pluggy) are included

These updates reflect Cthulhu's evolution from a simple Orca fork to a
feature-rich, desktop-agnostic screen reader with plugin capabilities.

🤖 Generated with [Claude Code](https://claude.ai/code)

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

distro-packages/Arch-Linux/PKGBUILD

@@ -2,37 +2,54 @@
 
 pkgname=cthulhu
 pkgver=2025.07.01
-pkgrel=1
-pkgdesc="Screen reader for individuals who are blind or visually impaired forked from Orca"
+pkgrel=2
+pkgdesc="Desktop-agnostic screen reader with plugin system, forked from Orca"
 url="https://git.stormux.org/storm/cthulhu"
 arch=(any)
 license=(LGPL)
 depends=(
+  # Core AT-SPI accessibility 
   at-spi2-core
-  brltty
+  python-atspi
   gobject-introspection-runtime
-  gsettings-desktop-schemas
+  python-gobject
+  python-cairo
+  gtk3
+  
+  # Audio and speech
+  speech-dispatcher
   gstreamer
   gst-plugins-base # playbin, audiotestsrc, basic decoders
   gst-plugins-good # pulsesink, more decoders
-  gtk3
-  hicolor-icon-theme
+  
+  # Braille support
+  brltty
   liblouis
+  
+  # Plugin system and D-Bus remote control
+  python-pluggy
+  python-dasbus
   libpeas
+  
+  # Desktop integration
+  gsettings-desktop-schemas
+  hicolor-icon-theme
   libwnck3
   pango
+  
+  # System utilities
   python
-  python-atspi
-  python-cairo
-  python-gobject
-  python-pluggy
   python-setproctitle
-  python-dasbus
-  socat
-  speech-dispatcher
+  socat # for self-voicing feature
   xorg-xkbcomp
   xorg-xmodmap
 )
+optdepends=(
+  'espeak-ng: Alternative TTS engine'
+  'festival: Alternative TTS engine' 
+  'flite: Lightweight TTS engine'
+  'espeak: Legacy TTS engine'
+)
 makedepends=(
   git
 )