refactor: unified google vein, prefixed module loading, cfg separation

- Unified google vein with OAuth + Sheets API
- Prefixed vein module loading (vein_google) to avoid pip package shadowing
- Preload pip packages before vein loading
- Added common/auth framework
- Rebranded sbwrapper from Pawprint to Soleprint
- Removed cfg/ from history (now separate repo)
- Keep cfg/standalone/ as sample configuration
- gitignore cfg/amar/ and cfg/dlt/ (private configs)

cfg/standalone/data/veins.json

@@ -18,7 +18,7 @@
       "name": "google",
       "slug": "google",
       "title": "Google",
-      "status": "planned",
+      "status": "building",
       "system": "artery"
     },
     {