v0.3.2: Cache Directory Permissions Fix

Fixed build issues in FreeBSD/Linux and jails/Docker permissions

Implement XDG Base Directory specification for cache directory
resolution with multiple fallbacks to prevent permission denied errors
in FreeBSD jails, Docker containers, and other restricted environments.

Changes:

• Add QUICKHEADLINES_CACHE_DIR environment variable support
• Add cache_dir configuration option to feeds.yml
• Implement XDG cache directory fallbacks (~/.cache/quickheadlines)
• Add helpful error messages with solutions when cache creation fails
• Update misc/Bastillefile to set cache directory and environment
• Add misc/quickheadlines rc.d script for FreeBSD service management
• Fix CI workflow pkg-config path for SQLite3/OpenSSL detection