feat: show notification when the checkpoint initialization fails (#7766)

Co-authored-by: daniel-lxs <[email protected]>

Author: roomote[bot]

src/i18n/locales/ca/common.json

@@ -29,6 +29,7 @@
 		"checkpoint_timeout": "Timed out when attempting to restore checkpoint.",
 		"checkpoint_failed": "Failed to restore checkpoint.",
 		"git_not_installed": "Git is required for the checkpoints feature. Please install Git to enable checkpoints.",
+		"nested_git_repos_warning": "Checkpoints are disabled because nested git repositories were detected in the workspace. To use checkpoints, please remove or relocate nested git repositories.",
 		"no_workspace": "Please open a project folder first",
 		"update_support_prompt": "Failed to update support prompt",
 		"reset_support_prompt": "Failed to reset support prompt",