docs(api): improve api documentation (#3343)

docs/api.md

@@ -0,0 +1,64 @@
+# API
+
+Sunshine has a RESTful API which can be used to interact with the service.
+
+Unless otherwise specified, authentication is required for all API calls. You can authenticate using
+basic authentication with the admin username and password.
+
+## GET /api/apps
+@copydoc confighttp::getApps()
+
+## GET /api/logs
+@copydoc confighttp::getLogs()
+
+## POST /api/apps
+@copydoc confighttp::saveApp()
+
+## DELETE /api/apps{index}
+@copydoc confighttp::deleteApp()
+
+## POST /api/covers/upload
+@copydoc confighttp::uploadCover()
+
+## GET /api/config
+@copydoc confighttp::getConfig()
+
+## GET /api/configLocale
+@copydoc confighttp::getLocale()
+
+## POST /api/config
+@copydoc confighttp::saveConfig()
+
+## POST /api/restart
+@copydoc confighttp::restart()
+
+## POST /api/password
+@copydoc confighttp::savePassword()
+
+## POST /api/pin
+@copydoc confighttp::savePin()
+
+## POST /api/clients/unpair-all
+@copydoc confighttp::unpairAll()
+
+## POST /api/clients/unpair
+@copydoc confighttp::unpair()
+
+## GET /api/clients/list
+@copydoc confighttp::listClients()
+
+## GET /api/apps/close
+@copydoc confighttp::closeApp()
+
+<div class="section_buttons">
+
+| Previous                                    |                                  Next |
+|:--------------------------------------------|--------------------------------------:|
+| [Performance Tuning](performance_tuning.md) | [Troubleshooting](troubleshooting.md) |
+
+</div>
+
+<details style="display: none;">
+  <summary></summary>
+  [TOC]
+</details>