Moved the plugin directory

plugins.go

@@ -173,13 +173,24 @@ func (p *PluginFilters) Errors() []error {
 	return p.errors
 }
 
-// pluginDir returns the plugin directory: $HOME/.config/dequoter/plugins
+// pluginDir returns the plugin directory under macOS Application Support.
 func pluginDir() (string, error) {
 	home, err := os.UserHomeDir()
 	if err != nil {
 		return "", err
 	}
-	return filepath.Join(home, ".config", "dequoter", "plugins"), nil
+	return filepath.Join(home, "Library", "Application Support", "dev.lmika.dequoter", "Plugins"), nil
+}
+
+func ensurePluginDir() (string, error) {
+	dir, err := pluginDir()
+	if err != nil {
+		return "", err
+	}
+	if err := os.MkdirAll(dir, 0755); err != nil {
+		return "", fmt.Errorf("create plugin directory: %w", err)
+	}
+	return dir, nil
 }
 
 var nonSlugChars = regexp.MustCompile(`[^a-z0-9]+`)