chore: initialize gentoo-setup documentation repository

Add comprehensive documentation for Lenovo ThinkPad Gentoo Linux setup
including:
- Complete system configuration guides (power, Bluetooth, WiFi, audio)
- Hardware setup documentation (touchpad, touchscreen, DisplayLink)
- Management scripts with ZSH completions
- Kernel configuration (6.12.41-gentoo-x86_64)
- Lid automation and monitor management
- Battery conservation system
- User guides and troubleshooting

Repository includes .gitignore to exclude logs, temporary files, and
secrets.

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

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

scripts/audio-setup/_audio-setup

@@ -0,0 +1,76 @@
+#compdef audio-setup
+
+# ZSH completion for audio-setup
+# Install to: /usr/local/share/zsh/site-functions/_audio-setup
+
+_audio-setup() {
+    local -a commands
+    commands=(
+        'status:Show current audio status'
+        'list-outputs:List all output devices'
+        'list-inputs:List all input devices'
+        'output:Switch to output device'
+        'input:Switch to input device'
+        'volume:Set volume (0-100)'
+        'mute:Mute output'
+        'unmute:Unmute output'
+        'mute-input:Mute input'
+        'unmute-input:Unmute input'
+        'help:Show help message'
+    )
+
+    local curcontext="$curcontext" state line
+    typeset -A opt_args
+
+    _arguments -C \
+        '1: :->command' \
+        '2: :->argument'
+
+    case $state in
+        command)
+            _describe 'command' commands
+            ;;
+        argument)
+            case $line[1] in
+                output|set-output)
+                    # Complete with output device numbers
+                    local -a outputs
+                    local index=1
+                    while IFS= read -r sink; do
+                        local sink_name=$(echo "$sink" | awk '{print $2}')
+                        local description=$(pactl list sinks 2>/dev/null | grep -A 1 "Name: $sink_name" | grep "Description:" | cut -d: -f2- | sed 's/^[[:space:]]*//')
+                        outputs+=("$index:$description")
+                        ((index++))
+                    done < <(pactl list short sinks 2>/dev/null)
+                    _describe 'output device' outputs
+                    ;;
+                input|set-input)
+                    # Complete with input device numbers
+                    local -a inputs
+                    local index=1
+                    while IFS= read -r source; do
+                        local source_name=$(echo "$source" | awk '{print $2}')
+                        local description=$(pactl list sources 2>/dev/null | grep -A 1 "Name: $source_name" | grep "Description:" | cut -d: -f2- | sed 's/^[[:space:]]*//')
+                        inputs+=("$index:$description")
+                        ((index++))
+                    done < <(pactl list short sources 2>/dev/null | grep -v "\.monitor$")
+                    _describe 'input device' inputs
+                    ;;
+                volume|vol)
+                    # Suggest common volume levels
+                    local -a volumes
+                    volumes=(
+                        '0:Mute'
+                        '25:25%'
+                        '50:50%'
+                        '75:75%'
+                        '100:100%'
+                    )
+                    _describe 'volume level' volumes
+                    ;;
+            esac
+            ;;
+    esac
+}
+
+_audio-setup "$@"