chore: fix .gitignore syntax and exclude pycache/pyo/DS_Store.

Replace ".venv/*" (wrong syntax — only ignores files inside) with
".venv/" so the directory itself is ignored. Add __pycache__/, *.pyc,
*.pyo, and .DS_Store which were missing and previously got tracked.

Companion to a history rewrite that strips .venv/, __pycache__/,
*.pyc, ACES_workflow/, _ComfyUI_workflows/, and _ComfyUI_settings/
from past commits (these trees were already removed from the working
tree in earlier releases but bloated the repo to 235MB; post-rewrite
size ~24MB).

Made-with: Cursor

.gitignore

@@ -1,8 +1,13 @@
 _safe*
-.venv/*
+.venv/
 Runpod_Comfy/
 PLAN.md
 
 .env
 .env.local
 .env.*.local
+
+__pycache__/
+*.pyc
+*.pyo
+.DS_Store