chore: remove Claude plans and prevent future commits (#245)

Signed-off-by: Jose Colella <jose.colella@gusto.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: josecolella

.gitignore

@@ -14,3 +14,6 @@ Gemfile.lock
 
 # IDEs
 .cursor/
+
+# Claude plans
+docs/plans/