Add missing translations (#305)

Reviewed-on: https://gitea.com/gitea/docs/pulls/305

i18n/zh-tw/docusaurus-plugin-content-docs/current/usage/actions/_category_.json

@@ -0,0 +1,9 @@
+{
+  "label": "Actions",
+  "position": 30,
+  "link": {
+    "type": "generated-index",
+    "slug": "/usage/actions",
+    "description": "Automating workflows with Actions"
+  }
+}

i18n/zh-tw/docusaurus-plugin-content-docs/current/usage/packages/_category_.json

@@ -0,0 +1,9 @@
+{
+  "label": "Packages",
+  "position": 40,
+  "link": {
+    "type": "generated-index",
+    "slug": "/usage/packages",
+    "description": "Managing packages and package registries"
+  }
+}