Add telemetry events for loading extensions (#9793)

* Store extensions versions' wasm API version in the database
* Share a common struct for extension API responses between collab and
client
* Add wasm API version and schema version to extension API responses

Release Notes:

- N/A

Co-authored-by: Marshall <marshall@zed.dev>

crates/collab/src/db/tables/extension_version.rs

@@ -14,6 +14,7 @@ pub struct Model {
     pub repository: String,
     pub description: String,
     pub schema_version: i32,
+    pub wasm_api_version: Option<String>,
     pub download_count: i64,
 }