Enhance disk cleanup script with discovery and additional cleanup

Added comprehensive analysis and additional cleanup targets:

Discovery Features (for future optimization):
- List top 20 largest installed packages with sizes
- Scan /usr for large directories (>500MB)
- Scan /opt for large directories
- Scan /usr/local for large directories
- This helps identify new cleanup opportunities over time

Additional Package Removals:
- MySQL packages (^mysql-.*)
- MongoDB packages (^mongodb-.*)
- PostgreSQL packages (^postgresql-.*)
- snapd
- azure-cli (was missing from package list)

Additional Directory Removals:
- /usr/share/swift (Swift toolchain)
- /usr/local/julia* (Julia language)
- /usr/share/kotlinc (Kotlin compiler)
- /usr/local/aws-cli (AWS CLI)
- /root/.rustup (Rust toolchain)
- /root/.cargo (Rust packages)
- /imagegeneration (Azure image generation tools)
- /var/lib/docker/tmp/* (Docker temp files)
- /var/cache/apt/archives/* (APT package cache)
- /var/lib/apt/lists/* (APT list cache)
- /var/lib/snapd/cache/* (Snap cache)

Docker Cleanup Enhancement:
- Added --volumes flag to prune volumes too
- Remove Docker temp directory

Expected Additional Space Freed:
- Previous: ~30GB
- Now: ~35-40GB (additional 5-10GB from new targets)

The discovery output will help identify if GitHub adds new large
packages/tools to their runners that we should add to cleanup.

Author: diraol

.github/scripts/free_disk_space.sh

@@ -16,16 +16,50 @@ echo "==========================================================================
 echo "Disk space before cleanup:"
 df -h
 
+echo ""
+echo "=============================================================================="
+echo "Analyzing large packages and directories (for future optimization)..."
+echo "=============================================================================="
+
+# List top 20 largest packages
+echo ""
+echo "Top 20 largest packages:"
+dpkg-query -Wf '${Installed-Size}\t${Package}\n' | sort -rn | head -n 20 | awk '{printf "  %6.1f MB  %s\n", $1/1024, $2}'
+
+# Find large directories in common locations
+echo ""
+echo "Large directories (>500MB) in /usr:"
+du -h -d 2 /usr/ 2>/dev/null | grep -E "^[0-9.]+G|^[5-9][0-9][0-9]M" | sort -rh | head -n 15 || true
+
+echo ""
+echo "Large directories (>500MB) in /opt:"
+du -h -d 2 /opt/ 2>/dev/null | grep -E "^[0-9.]+G|^[5-9][0-9][0-9]M" | sort -rh | head -n 10 || true
+
+echo ""
+echo "Large directories (>500MB) in /usr/local:"
+du -h -d 2 /usr/local/ 2>/dev/null | grep -E "^[0-9.]+G|^[5-9][0-9][0-9]M" | sort -rh | head -n 10 || true
+
+echo ""
+echo "=============================================================================="
+echo "Starting cleanup..."
+echo "=============================================================================="
+
+echo ""
 echo "Removing large packages..."
 sudo apt-get remove -y '^ghc-8.*' '^ghc-9.*' || true
 sudo apt-get remove -y '^dotnet-.*' || true
 sudo apt-get remove -y '^llvm-.*' || true
 sudo apt-get remove -y 'php.*' || true
-sudo apt-get remove -y google-cloud-sdk hhvm google-chrome-stable firefox powershell mono-devel || true
+sudo apt-get remove -y azure-cli google-cloud-sdk hhvm google-chrome-stable firefox powershell mono-devel || true
 sudo apt-get remove -y temurin-* || true
+sudo apt-get remove -y '^mysql-.*' || true
+sudo apt-get remove -y '^mongodb-.*' || true
+sudo apt-get remove -y '^postgresql-.*' || true
+sudo apt-get remove -y snapd || true
 sudo apt-get autoremove -y
 sudo apt-get clean
 
+echo ""
 echo "Removing large directories..."
 sudo rm -rf /usr/share/dotnet/ || true
 sudo rm -rf /usr/local/lib/android || true
@@ -37,11 +71,37 @@ sudo rm -rf /usr/local/.ghcup/ || true
 sudo rm -rf /usr/local/share/powershell || true
 sudo rm -rf /usr/local/share/chromium || true
 sudo rm -rf /usr/local/lib/node_modules || true
+sudo rm -rf /usr/share/swift || true
+sudo rm -rf /usr/local/julia* || true
+sudo rm -rf /usr/share/kotlinc || true
+sudo rm -rf /usr/local/aws-cli || true
+sudo rm -rf /root/.rustup || true
+sudo rm -rf /root/.cargo || true
+sudo rm -rf /imagegeneration || true
+
+echo ""
+echo "Removing Docker images and build cache..."
+sudo docker system prune -af --volumes || true
+sudo rm -rf /var/lib/docker/tmp/* || true
+
+echo ""
+echo "Removing APT cache..."
+sudo rm -rf /var/cache/apt/archives/* || true
+sudo rm -rf /var/lib/apt/lists/* || true
 
-echo "Removing Docker images..."
-sudo docker system prune -af || true
+echo ""
+echo "Removing snap cache..."
+sudo rm -rf /var/lib/snapd/cache/* || true
+
+echo ""
+echo "=============================================================================="
+echo "Cleanup completed!"
+echo "=============================================================================="
 
+echo ""
 echo "Disk space after cleanup:"
 df -h
 
-echo "Cleanup completed successfully!"
+echo ""
+echo "Summary of freed space:"
+df -h / | awk 'NR==1 {print "  " $0} NR==2 {print "  " $0 " (root filesystem)"}'