context_servers: Add ability to provide labels for prompt outputs (#17077)

Server can now include an optional description in a `prompts/get`
response. Zed will displayed the description as label of the slash
command.

Release Notes:

- context_servers: Servers can provide an optional description in
`prompts/get` responses that is displayed as the slash command label.

crates/context_servers/src/protocol.rs

@@ -112,7 +112,7 @@ impl InitializedContextServerProtocol {
         &self,
         prompt: P,
         arguments: HashMap<String, String>,
-    ) -> Result<String> {
+    ) -> Result<types::PromptsGetResponse> {
         self.check_capability(ServerCapability::Prompts)?;
 
         let params = types::PromptsGetParams {
@@ -125,7 +125,7 @@ impl InitializedContextServerProtocol {
             .request(types::RequestType::PromptsGet.as_str(), params)
             .await?;
 
-        Ok(response.prompt)
+        Ok(response)
     }
 }
 

crates/context_servers/src/types.rs

@@ -102,6 +102,7 @@ pub struct ResourcesListResponse {
 #[derive(Debug, Deserialize)]
 #[serde(rename_all = "camelCase")]
 pub struct PromptsGetResponse {
+    pub description: Option<String>,
     pub prompt: String,
 }