Add Calibre theme integration

[chipkoziara]

Problem Statement

Calibre doesn't natively update with Omarchy themes, so I added a new script and call in bin/omarchy-theme-set to trigger Calibre theme changes. Calibre is a little finicky with updating themes, so I added logic to make sure it closes and applies the theme whenever a user changes the Omarchy theme.

Summary

Syncs the current Omarchy theme to Calibre's custom palette system when switching themes. Follows the same pattern as the existing Obsidian, VS Code, and browser integrations.

• Parses colors.toml and maps colors to Qt QPalette roles (deriving shades like AlternateBase and PlaceholderText via a blend() helper since colors.toml only has ~6 base colors but Calibre's palette needs 15)
• Detects light/dark mode via light.mode marker
• Writes the palette to Calibre's gprefs via calibre-debug -c (Calibre stores palettes in a Python-managed JSON config, not a plain file)
• Restarts Calibre if it was running -- kills it before writing the palette because Calibre's shutdown handler saves its in-memory config to disk, which would overwrite our changes
• Reopens Calibre on its original workspace after restarting -- captures the workspace via hyprctl before killing, then sets a temporary windowrule so it opens silently in the right place
• Guarded by omarchy-cmd-present calibre -- no-op if Calibre isn't installed

Files

• bin/omarchy-theme-set-calibre → new script
• bin/omarchy-theme-set → added omarchy-theme-set-calibre between obsidian and keyboard

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[chipkoziara]

Here's a demo of Calibre's theme updating with Omarchy theme changes:

calibre-theme-demo.mp4