fix: resolve repo audit issues and improve formatting

[christopherfoxjr]

This PR addresses several issues identified by the repository audit script and Prettier:

• Repo Audit Logic: Removed a stale check for ldconfig after PaperDE installation (as the project moved to Budgie) and added an exclusion for repo_audit.sh itself in the chmod 777 check to prevent false positives.
• File Integrity: Truncated .gitkeep and branding/.gitkeep to 0 bytes to satisfy strict audit requirements.
• Script Cleanup: Removed trailing whitespace in build.sh.
• Formatting: Systematically reformatted markdown files using Prettier to ensure consistency across the documentation.

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PR created automatically by Jules for task 9513498285813274562 started by @christopherfoxjr

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