Merge two translation contributing documents (go-gitea#23939)

This PR also adjusts the weights.

---------

Co-authored-by: delvh <dev.lh@web.de>

docs/content/doc/contributing/guidelines-frontend.en-us.md

@@ -2,14 +2,14 @@
 date: "2021-10-13T16:00:00+02:00"
 title: "Guidelines for Frontend Development"
 slug: "guidelines-frontend"
-weight: 20
+weight: 30
 toc: false
 draft: false
 menu:
   sidebar:
     parent: "contributing"
     name: "Guidelines for Frontend"
-    weight: 20
+    weight: 30
     identifier: "guidelines-frontend"
 ---
 

docs/content/doc/contributing/guidelines-refactoring.en-us.md

@@ -2,14 +2,14 @@
 date: "2023-02-14T00:00:00+00:00"
 title: "Guidelines for Refactoring"
 slug: "guidelines-refactoring"
-weight: 20
+weight: 40
 toc: false
 draft: false
 menu:
   sidebar:
     parent: "contributing"
     name: "Guidelines for Refactoring"
-    weight: 20
+    weight: 40
     identifier: "guidelines-refactoring"
 ---
 

docs/content/doc/contributing/translation.de-de.md → docs/content/doc/contributing/localization.de-de.md

@@ -1,15 +1,16 @@
 ---
 date: "2021-01-22T00:00:00+02:00"
 title: "Übersetzungs Richtlinien"
+slug: "localization"
 weight: 70
-toc: true
+toc: false
 draft: false
 menu:
   sidebar:
     parent: "contributing"
     name: "Übersetzungsrichtlinien"
     weight: 70
-    identifier: "translation-guidelines"
+    identifier: "localization"
 ---
 
 ## Allgemeines

docs/content/doc/contributing/localization.en-us.md

@@ -2,14 +2,14 @@
 date: "2016-12-01T16:00:00+02:00"
 title: "Localization"
 slug: "localization"
-weight: 10
+weight: 70
 toc: false
 draft: false
 menu:
   sidebar:
     parent: "contributing"
     name: "Localization"
-    weight: 20
+    weight: 70
     identifier: "localization"
 ---
 
@@ -31,3 +31,7 @@ After a translation has been accepted, it will be reflected in the main reposito
 At the time of writing, this means that a changed translation may not appear until the following Gitea release.
 
 If you use a bleeding edge build, it should appear as soon as you update after the change is synced.
+
+# How to Contribute
+
+Different Languages have different translation guidelines. Please visit the respective page for more information.

docs/content/doc/contributing/localization.zh-cn.md

@@ -2,14 +2,14 @@
 date: "2016-12-01T16:00:00+02:00"
 title: "本地化"
 slug: "localization"
-weight: 20
+weight: 70
 toc: false
 draft: false
 menu:
   sidebar:
     parent: "contributing"
     name: "本地化"
-    weight: 20
+    weight: 70
     identifier: "localization"
 ---
 

docs/content/doc/contributing/localization.zh-tw.md

@@ -2,14 +2,14 @@
 date: "2016-12-01T16:00:00+02:00"
 title: "在地化"
 slug: "localization"
-weight: 20
+weight: 70
 toc: false
 draft: false
 menu:
   sidebar:
     parent: "contributing"
     name: "在地化"
-    weight: 20
+    weight: 70
     identifier: "localization"
 ---