chore: ignore .antigravitycli (#69)

Add .antigravitycli to .gitignore to exclude the Antigravity CLI local artifacts from version control.

Co-authored-by: duyetbot <duyetbot@users.noreply.github.com>

Author: duyet

.gitignore

@@ -2,5 +2,6 @@
 *.log
 .claude/*.local.md
 .claude/*.local.json
+.antigravitycli
 node_modules/
 duyetbot/knowledge/_raw_data.txt