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/cloud_api_client/Cargo.toml

@@ -0,0 +1,21 @@
+[package]
+name = "cloud_api_client"
+version = "0.1.0"
+edition.workspace = true
+publish.workspace = true
+license = "Apache-2.0"
+
+[lints]
+workspace = true
+
+[lib]
+path = "src/cloud_api_client.rs"
+
+[dependencies]
+anyhow.workspace = true
+cloud_api_types.workspace = true
+futures.workspace = true
+http_client.workspace = true
+parking_lot.workspace = true
+serde_json.workspace = true
+workspace-hack.workspace = true