Add 1.24.0-rc0 documentation (#220)

Reviewed-on: https://gitea.com/gitea/docs/pulls/220

versioned_docs/version-1.24/development.md

@@ -0,0 +1,12 @@
+---
+date: "2016-12-01T16:00:00+02:00"
+title: "Development"
+slug: "development"
+sidebar_position: 40
+
+menu:
+  sidebar:
+    name: "Development"
+    sidebar_position: 40
+    identifier: "development"
+---