refactor: urfave v3

vendor/github.com/urfave/cli/v3/flag_string_map.go

@@ -0,0 +1,20 @@
+package cli
+
+type (
+	StringMap     = MapBase[string, StringConfig, stringValue]
+	StringMapFlag = FlagBase[map[string]string, StringConfig, StringMap]
+)
+
+var NewStringMap = NewMapBase[string, StringConfig, stringValue]
+
+// StringMap looks up the value of a local StringMapFlag, returns
+// nil if not found
+func (cmd *Command) StringMap(name string) map[string]string {
+	if v, ok := cmd.Value(name).(map[string]string); ok {
+		tracef("string map available for flag name %[1]q with value=%[2]v (cmd=%[3]q)", name, v, cmd.Name)
+		return v
+	}
+
+	tracef("string map NOT available for flag name %[1]q (cmd=%[2]q)", name, cmd.Name)
+	return nil
+}