feat(kugetsu): add local config file for user overrides

- Source ~/.kugetsu/config on each command call
- Allows user to override defaults (e.g., MAX_CONCURRENT_AGENTS)
- Changes take effect immediately, no re-init needed

Fixes #67

skills/kugetsu/scripts/kugetsu

@@ -10,6 +10,11 @@ NOTIFICATIONS_FILE="$KUGETSU_DIR/notifications.json"
 LOGS_DIR="$KUGETSU_DIR/logs"
 MAX_CONCURRENT_AGENTS="${MAX_CONCURRENT_AGENTS:-3}"
 
+# Load user config overrides (~/.kugetsu/config)
+if [ -f "$KUGETSU_DIR/config" ]; then
+    source "$KUGETSU_DIR/config"
+fi
+
 count_active_dev_sessions() {
     local count=0
     if [ -d "$SESSIONS_DIR" ]; then