cloud_api_types: Add more data to the GetAuthenticatedUserResponse (#35384)

This PR adds more data to the `GetAuthenticatedUserResponse`.

We now return more information about the authenticated user, as well as
their plan information.

Release Notes:

- N/A

crates/cloud_llm_client/src/cloud_llm_client.rs

@@ -308,13 +308,13 @@ pub struct GetSubscriptionResponse {
     pub usage: Option<CurrentUsage>,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
 pub struct CurrentUsage {
     pub model_requests: UsageData,
     pub edit_predictions: UsageData,
 }
 
-#[derive(Debug, Serialize, Deserialize)]
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
 pub struct UsageData {
     pub used: u32,
     pub limit: UsageLimit,