feat(auto-cpufreq): add auto-cpufreq daemon monitor and control plugin

[4rmcyt]

Summary

• Bar widget showing active CPU governor and turbo state, color-coded by profile (powersave/performance)
• Panel with CPU usage, frequency, temperature, battery status, and segmented controls for force override and turbo boost
• Right-click context menu for quick override without opening the panel
• Reads override state directly from auto-cpufreq pickle files (/run/override.pickle, /opt/auto-cpufreq/override.pickle) — always in sync with the daemon
• Works with Intel (intel_pstate) and AMD (k10temp, amd_pstate) CPUs
• Battery status via sysfs (dynamic device detection — works with BAT0, BAT1, etc.)
• Uses SystemStatService for CPU stats (usage, freq, temp)
• pkexec for elevated actions with graceful error banner if polkit not configured

Test plan

• Plugin loads with qs -c noctalia-shell
• Bar widget shows governor and turbo state
• Panel opens on click, shows CPU stats, battery, governor info
• Force override buttons reflect real daemon state (reads pickle file)
• Turbo boost buttons reflect real turbo override state
• pkexec error banner appears when polkit not configured
• Settings panel saves refresh interval and compact mode
• Tested on Niri with AMD CPU (Matebook, Ryzen 7000)

Polkit setup

See setup_polkit.sh in the plugin directory — runs on any distro, detects binary path and privilege group automatically. NixOS instructions in README.md.

🤖 Generated with Claude Code

[github-actions]

Automatic Manifest Check

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File: auto-cpufreq/manifest.json

• (H) Line 8: The repository field needs to point to the "https://github.com/noctalia-dev/noctalia-plugins" github repository!

+  "repository": "",

[github-actions]

Automatic Code Quality Review

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File: auto-cpufreq/BarWidget.qml

• (H) Line 250: Do not use hardcoded values, always prefer to use the Style singleton instead

+                spacing: 1

• (H) Line 263: Use translations instead of hardcoded text. Instead of: "Example Label". To: pluginApi?.tr("panel.example-label")

+                    text: "turbo: " + root.turboState

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File: auto-cpufreq/Panel.qml

• (H) Line 55: Do not use hardcoded values, always prefer to use the Style singleton instead

+                        spacing: 2

• (H) Line 58: Use translations instead of hardcoded text. Instead of: "Example Label". To: pluginApi?.tr("panel.example-label")

+                            text: "auto-cpufreq"

• (H) Line 160: Do not use hardcoded values, always prefer to use the Style singleton instead

+                        spacing: 2

• (H) Line 308: Do not use hardcoded values, always prefer to use the Style singleton instead

+                        border.width: 1

• (H) Line 370: Do not use hardcoded values, always prefer to use the Style singleton instead

+                        border.width: 1

• (H) Line 411: Do not use hardcoded values, always prefer to use the Style singleton instead

+        spacing: 2

• (H) Line 437: Do not use hardcoded values, always prefer to use the Style singleton instead

+            anchors { fill: parent; margins: 3 }

• (H) Line 449: Do not use hardcoded values, always prefer to use the Style singleton instead

+            spacing: 1