chore: ignore stray git bundles

A lost `:` in an scp target to the Windows VM wrote three git bundles into
the working tree instead of onto the guest, and they were committed — 7.9 MB
of repository history carried in a feature branch. They have been scrubbed
from this branch; this keeps the next slip from being committed at all.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012M9UE2Txyh7w8wyothDPTe

.gitignore

@@ -82,3 +82,8 @@ target-linux/
 .kommandr/kommandr.db
 .kommandr/kommandr.db-wal
 .kommandr/kommandr.db-shm
+
+# Stray git bundles from the Windows VM transfer (a lost `:` in an scp target
+# once committed three of these, 7.9 MB, into a feature branch).
+*.bundle
+*.gitbundle