Use built-in git instead of Git Automator extension

This commit updates the template settings
To use the built-in VS Code git integration instead of Git Automator.

- Automatically stage all changes
  "git.enableSmartCommit": true,

- Automatically push & pull changes to the remote after committing
  "git.postCommitCommand": "sync"

This feature could be improved further
By setting a default key-binding to Git: Commit All,
And/or by automatically committing on save or focus change
For the most SaaS-like experience.

.vscode/settings.json

@@ -7,5 +7,7 @@
   "workbench.colorTheme": "Gray Matter Light",
   "[markdown]": {
     "editor.quickSuggestions": true
-  }
+  },
+  "git.enableSmartCommit": true,
+  "git.postCommitCommand": "sync"
 }