Adds 55 Fleet-maintained app(s) whose cask token starts with 'P':
inputs, outputs, app icons (TSX + website PNG), and the matching
index.ts and apps.json entries.
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## Summary by CodeRabbit
* **New Features**
* Added support for 40+ macOS applications to the software catalog
(productivity, utilities, browsers, developer tools — e.g., Pacifist,
Pale Moon, Paletro, Pastebot, PDF Expert, PixelSnap, Plex, Proton apps,
and more).
* **New Icons**
* Added app icons for the newly listed applications so they appear in
the Software page.
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