Add gnommo load command to copy projects from removable media

Adds the inverse of the archive command: `gnommo load -p <project>`
inspects the configured external drive and rsyncs the project folder
onto the local drive. Supports --dry-run. Also expands .gitignore to
cover additional media file types and project directories.

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

.gitignore

@@ -7,16 +7,35 @@ __pycache__/
 venv/
 .venv/
 *.egg-info/
-
-Video1/*
+*.pdf
+*.png
+*.key
+*.bak
+shared_assets/*
+Video*/*
+Illustrations
 # OS
 .DS_Store
 Thumbs.db
+*/intermediate/*
 
 # Output
 **/out/
 *.mp4
+*.mov
+*.mp3
+*.aifc
+*.wav
+
 
 # Temp
 *.tmp
 .cache/
+
+# Secrets
+.env
+.env.*
+
+# Sync state (local only, per-environment)
+.gnommo_sync.json
+.gnommo_sync.prod.json