Adding app logos (#1077)

* Add Grain logo

* Add Slack logo

* Add other logos

Author: lucis

grain/mod.ts

@@ -21,7 +21,8 @@ export type AppContext = FnContext<State, Manifest>;
 /**
  * @name Grain
  * @title Grain
- * @description A Deco app for interacting with the Grain API.
+ * @description grain.com is an AI Notetaker for your meeting
+ * @logo https://images.ctfassets.net/9haz2glq4wt0/36OjNsjfRZpaR1QtYtPucU/391ae8f9716fa000508b11583fcc9ebb/Grain_AI_Logo.png
  * @version 1.0.0
  */
 export default function App(props: Props): App<Manifest, State> {

resend/mod.ts

@@ -31,9 +31,10 @@ export interface State extends Props {
   apiWrite: ReturnType<typeof createHttpClient<ResendApi>>;
 }
 /**
+ * @name Resend
  * @title Resend
- * @description app for sending emails using https://resend.com/
- * @logo https://raw.githubusercontent.com/deco-cx/apps/main/resend/logo.png
+ * @description Send emails using resend.com
+ * @logo https://mintlify.s3-us-west-1.amazonaws.com/resend/_generated/favicon/apple-touch-icon.png?v=3
  */
 export default function App({
   apiKey,

slack/mod.ts

@@ -26,9 +26,10 @@ export interface State extends Props {
 export type AppContext = FnContext<State, Manifest>;
 
 /**
- * @name SLACK
+ * @name Slack
  * @title Slack
- * @description A Deco app for interacting with Slack APIs with strongly typed responses
+ * @description Send messages and interact with Slack channels
+ * @logo https://cdn4.iconfinder.com/data/icons/logos-and-brands/512/306_Slack_logo-512.png
  */
 export default function App(props: Props): App<Manifest, State> {
   const slack = new SlackClient(