feat: add hooks functionality with automated workflows

- Introduced hooks to enable automated workflows triggered by specific events during GitHub Copilot sessions.
- Added documentation for hooks in AGENTS.md and README.md.
- Created a new directory structure for hooks, including README.md and hooks.json files.
- Implemented two example hooks: Session Auto-Commit and Session Logger.
- Developed scripts for logging session events and auto-committing changes.
- Enhanced validation and parsing for hook metadata.
- Updated build and validation scripts to accommodate new hooks functionality.

hooks/session-logger/log-session-end.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Log session end event
+
+set -euo pipefail
+
+# Skip if logging disabled
+if [[ "${SKIP_LOGGING:-}" == "true" ]]; then
+  exit 0
+fi
+
+# Read input from Copilot
+INPUT=$(cat)
+
+# Create logs directory if it doesn't exist
+mkdir -p logs/copilot
+
+# Extract timestamp
+TIMESTAMP=$(date -u +"%Y-%m-%dT%H:%M:%SZ")
+
+# Log session end
+echo "{\"timestamp\":\"$TIMESTAMP\",\"event\":\"sessionEnd\"}" >> logs/copilot/session.log
+
+echo "📝 Session end logged"
+exit 0