impl: retrofit API for endpoint discovery and dynamic client registration

Author: fioan89

src/main/kotlin/com/coder/toolbox/oauth/CoderAuthorizationApi.kt

@@ -0,0 +1,18 @@
+package com.coder.toolbox.oauth
+
+import retrofit2.Response
+import retrofit2.http.Body
+import retrofit2.http.GET
+import retrofit2.http.POST
+import retrofit2.http.Url
+
+interface CoderAuthorizationApi {
+    @GET(".well-known/oauth-authorization-server")
+    suspend fun discoveryMetadata(): Response<AuthorizationServer>
+
+    @POST
+    suspend fun registerClient(
+        @Url url: String,
+        @Body request: ClientRegistrationRequest
+    ): Response<ClientRegistrationResponse>
+}