bd init: initialize beads issue tracking

.beads/hooks/prepare-commit-msg

@@ -0,0 +1,9 @@
+#!/usr/bin/env sh
+# --- BEGIN BEADS INTEGRATION v0.57.0 ---
+# This section is managed by beads. Do not remove these markers.
+if command -v bd >/dev/null 2>&1; then
+  export BD_GIT_HOOK=1
+  bd hooks run prepare-commit-msg "$@"
+  _bd_exit=$?; if [ $_bd_exit -ne 0 ]; then exit $_bd_exit; fi
+fi
+# --- END BEADS INTEGRATION ---