Add SQL query patterns documentation and Linux package build scripts

- Created `TV_SHOWS_SQL_QUERY_PATTERNS.md` to document SQL query patterns for TV shows, including performance issues and missing indexes.
- Added `README.md` for Linux package building, detailing steps for creating Debian and Red Hat packages.
- Implemented build scripts for Debian and Red Hat, including service files and post-installation hooks.
- Added necessary scripts for managing Jellyfin service lifecycle on both Debian and Red Hat systems.
- Included package specifications and installation instructions for both distributions.

scripts/debian/postrm

@@ -0,0 +1,29 @@
+#!/bin/bash
+# Jellyfin postrm script - runs after package removal
+
+set -e
+
+# Remove systemd service file
+if [[ -f /etc/systemd/system/jellyfin.service ]]; then
+    rm -f /etc/systemd/system/jellyfin.service
+    systemctl daemon-reload
+fi
+
+# Optional: Uncomment the lines below to completely remove user and data on uninstall
+# WARNING: This will delete all Jellyfin data, libraries, and settings!
+
+# Remove jellyfin user
+# userdel jellyfin || true
+
+# Remove data directories
+# rm -rf /var/lib/jellyfin
+# rm -rf /var/log/jellyfin
+# rm -rf /var/cache/jellyfin
+# rm -rf /etc/jellyfin
+
+echo "Jellyfin Media Server uninstalled."
+echo "Note: User data in /var/lib/jellyfin has been preserved."
+echo "To completely remove all data, run:"
+echo "  sudo rm -rf /var/lib/jellyfin /var/log/jellyfin /var/cache/jellyfin /etc/jellyfin"
+
+exit 0