feat: publish HoloLake model-native living system source

product-source/hololake-platform/site/guides/connect-a-git-remote.md

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+# Connect A Git Remote
+
+Connect a remote when you want backup or sync beyond the current machine.
+
+## Before You Start
+
+Make sure the remote repository exists and your system Git can authenticate to it. HoloLake Era uses system Git rather than storing provider-specific credentials.
+
+## Steps
+
+1. Open the bottom status bar remote chip, or run `Add Remote` from the command palette.
+2. Paste the remote URL.
+3. Confirm the remote name.
+4. Fetch or push according to the app prompt.
+
+## Recommended Auth
+
+- SSH keys.
+- GitHub CLI authentication.
+- Existing Git credential helpers.
+- macOS Keychain credentials for HTTPS remotes on macOS.
+
+If authentication fails, see [Git Authentication](/troubleshooting/git-auth).