Add a schema to extensions, to prevent installing extensions on too old of a Zed version (#9599)

Release Notes:

- N/A

---------

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

crates/collab/src/api/extensions.rs

@@ -12,6 +12,7 @@ use axum::{
     Extension, Json, Router,
 };
 use collections::HashMap;
+use rpc::ExtensionApiManifest;
 use serde::{Deserialize, Serialize};
 use std::{sync::Arc, time::Duration};
 use time::PrimitiveDateTime;
@@ -33,6 +34,8 @@ pub fn router() -> Router {
 #[derive(Debug, Deserialize)]
 struct GetExtensionsParams {
     filter: Option<String>,
+    #[serde(default)]
+    max_schema_version: i32,
 }
 
 #[derive(Debug, Deserialize)]
@@ -51,20 +54,14 @@ struct GetExtensionsResponse {
     pub data: Vec<ExtensionMetadata>,
 }
 
-#[derive(Deserialize)]
-struct ExtensionManifest {
-    name: String,
-    version: String,
-    description: Option<String>,
-    authors: Vec<String>,
-    repository: String,
-}
-
 async fn get_extensions(
     Extension(app): Extension<Arc<AppState>>,
     Query(params): Query<GetExtensionsParams>,
 ) -> Result<Json<GetExtensionsResponse>> {
-    let extensions = app.db.get_extensions(params.filter.as_deref(), 500).await?;
+    let extensions = app
+        .db
+        .get_extensions(params.filter.as_deref(), params.max_schema_version, 500)
+        .await?;
     Ok(Json(GetExtensionsResponse { data: extensions }))
 }
 
@@ -267,7 +264,7 @@ async fn fetch_extension_manifest(
         })?
         .to_vec();
     let manifest =
-        serde_json::from_slice::<ExtensionManifest>(&manifest_bytes).with_context(|| {
+        serde_json::from_slice::<ExtensionApiManifest>(&manifest_bytes).with_context(|| {
             format!(
                 "invalid manifest for extension {extension_id} version {version}: {}",
                 String::from_utf8_lossy(&manifest_bytes)
@@ -287,6 +284,7 @@ async fn fetch_extension_manifest(
         description: manifest.description.unwrap_or_default(),
         authors: manifest.authors,
         repository: manifest.repository,
+        schema_version: manifest.schema_version.unwrap_or(0),
         published_at,
     })
 }