Add /task/ to .gitignore

Ignore task directories used by Claude Code subagents.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: reid-spencer

.gitignore

@@ -8,3 +8,4 @@
 hs_err_pid*
 .scalafmt.conf
 .scalafmt.conf.etag
+/task/