Add OAuth2Token, OAuth2TokenRevocation, and OAuth2AuthorizationCurrent to Route (#2935)

This adds routes to `Route` that are related to OAuth2 and token exchanges.

This is a step towards resolving #762 and #2475.

Author: valentinegb

src/http/client.rs

@@ -2944,7 +2944,7 @@ impl Http {
             multipart: None,
             headers: None,
             method: LightMethod::Get,
-            route: Route::Oauth2ApplicationCurrent,
+            route: Route::OAuth2ApplicationCurrent,
             params: None,
         })
         .await

src/http/routing.rs

@@ -361,10 +361,22 @@ routes! ('a, {
     api!("/invites/{}", code),
     Some(RatelimitingKind::Path);
 
-    Oauth2ApplicationCurrent,
+    OAuth2Token,
+    api!("/oauth2/token"),
+    None;
+
+    OAuth2TokenRevocation,
+    api!("/oauth2/token/revoke"),
+    None;
+
+    OAuth2ApplicationCurrent,
     api!("/oauth2/applications/@me"),
     None;
 
+    OAuth2AuthorizationCurrent,
+    api!("/oauth2/@me"),
+    None;
+
     StatusIncidentsUnresolved,
     status!("/incidents/unresolved.json"),
     None;