Add cloud_api_client and cloud_api_types crates (#35357)

This PR adds two new crates for interacting with Cloud:

- `cloud_api_client` - The client that will be used to talk to Cloud.
- `cloud_api_types` - The types for the Cloud API that are shared
between Zed and Cloud.

Release Notes:

- N/A

crates/http_client/src/http_client.rs

@@ -236,6 +236,22 @@ impl HttpClientWithUrl {
         )?)
     }
 
+    /// Builds a Zed Cloud URL using the given path.
+    pub fn build_zed_cloud_url(&self, path: &str, query: &[(&str, &str)]) -> Result<Url> {
+        let base_url = self.base_url();
+        let base_api_url = match base_url.as_ref() {
+            "https://zed.dev" => "https://cloud.zed.dev",
+            "https://staging.zed.dev" => "https://cloud.zed.dev",
+            "http://localhost:3000" => "http://localhost:8787",
+            other => other,
+        };
+
+        Ok(Url::parse_with_params(
+            &format!("{}{}", base_api_url, path),
+            query,
+        )?)
+    }
+
     /// Builds a Zed LLM URL using the given path.
     pub fn build_zed_llm_url(&self, path: &str, query: &[(&str, &str)]) -> Result<Url> {
         let base_url = self.base_url();