Move part of contributing section to client_development

src/en/SUMMARY.md

@@ -17,14 +17,15 @@
   - [Administration](federation/administration.md)
   - [Resources](federation/resources.md)
   - [Lemmy Protocol](federation/lemmy_protocol.md)
+- [Client Development](client_development/client_development.md)
+  - [Theming Guide](client_development/theming.md)
+  - [API reference](client_development/api_reference.md)
+  - [WebSocket API](https://join.lemmy.ml/api/index.html)
+  - [HTTP API](client_development/http_api.md)
+  - [Creating a Custom Frontend](client_development/custom_frontend.md)
 - [Contributing](contributing/contributing.md)
   - [Docker Development](contributing/docker_development.md)
   - [Local Development](contributing/local_development.md)
-  - [Theming Guide](contributing/theming.md)
-  - [API reference](contributing/api_reference.md)
-  - [WebSocket API](https://join.lemmy.ml/api/index.html)
-  - [HTTP API](contributing/http_api.md)
-  - [Creating a Custom Frontend](contributing/custom_frontend.md)
   - [Tests](contributing/tests.md)
   - [Federation Development](contributing/federation_development.md)
 - [Code of Conduct](code_of_conduct.md)

src/en/client_development/client_development.md

@@ -0,0 +1,6 @@
+# Client Development
+
+- [Theming Guide](client_development/theming.md)
+- [API reference](client_development/api_reference.md)
+- [WebSocket API](https://join.lemmy.ml/api/index.html)
+- [HTTP API](client_development/http_api.md)