feat(history): add Atuin context scopes

internal/workspace/workspace.go

@@ -108,6 +108,21 @@ func detectGitInfo(cwd string) (hasGit bool, branch string) {
 	return hasGit, ""
 }
 
+// GitRoot returns the repository root containing cwd, or an empty string.
+func GitRoot(cwd string) string {
+	dir := filepath.Clean(cwd)
+	for {
+		if _, err := os.Stat(filepath.Join(dir, ".git")); err == nil {
+			return dir
+		}
+		parent := filepath.Dir(dir)
+		if parent == dir {
+			return ""
+		}
+		dir = parent
+	}
+}
+
 type cacheEntry struct {
 	key  string // cwd + "|" + dirModTime
 	info WorkspaceInfo