Rename develop -> development, contribute -> contributing, administer -> administration (#23662)

backport #23629 

To make versioned documentation less surprising, 1.19 should have the
same technology.

docs/content/doc/developers/integrations.en-us.md

@@ -1,45 +0,0 @@
----
-date: "2019-04-15T17:29:00+08:00"
-title: "Integrations"
-slug: "integrations"
-weight: 40
-toc: false
-draft: false
-menu:
-  sidebar:
-    parent: "developers"
-    name: "Integrations"
-    weight: 65
-    identifier: "integrations"
----
-
-# Integrations
-
-Gitea has a wonderful community of third-party integrations, as well as first-class support in various other
-projects.
-
-We are curating a list over at [awesome-gitea](https://gitea.com/gitea/awesome-gitea) to track these!
-
-If you are looking for [CI/CD](https://gitea.com/gitea/awesome-gitea#user-content-devops),
-an [SDK](https://gitea.com/gitea/awesome-gitea#user-content-sdk),
-or even some extra [themes](https://gitea.com/gitea/awesome-gitea#user-content-themes),
-you can find them listed in the [awesome-gitea](https://gitea.com/gitea/awesome-gitea) repository!
-
-## Pre-Fill New File name and contents
-
-If you'd like to open a new file with a given name and contents,
-you can do so with query parameters:
-
-```txt
-GET /{{org}}/{{repo}}/_new/{{filepath}}
-    ?filename={{filename}}
-    &value={{content}}
-```
-
-For example:
-
-```txt
-GET https://git.example.com/johndoe/bliss/_new/articles/
-    ?filename=hello-world.md
-    &value=Hello%2C%20World!
-```