feat(site): enable assistant view in slack manifest (#207)

Author: hugodutka

internal/site/lib/slack-manifest.ts

@@ -17,6 +17,10 @@ export interface SlackManifest {
       messages_tab_enabled?: boolean;
       messages_tab_read_only_enabled?: boolean;
     };
+    assistant_view: {
+      assistant_description: string;
+      suggested_prompts: string[];
+    };
   };
   oauth_config: {
     scopes: {
@@ -74,6 +78,10 @@ export function createAgentSlackManifest(
         messages_tab_enabled: true,
         messages_tab_read_only_enabled: false,
       },
+      assistant_view: {
+        assistant_description: `A helpful assistant powered by Blink`,
+        suggested_prompts: [],
+      },
     },
     oauth_config: {
       scopes: {