Improve apps (#19256)

- simplify the base application template
- remove --exhaustive option and replace by a --example option like in
next.js https://nextjs.org/docs/app/api-reference/cli
- Fix some bugs and logs
- add a post-card app in twenty-apps/examples/

packages/twenty-front/src/modules/applications/graphql/fragments/applicationFragment.ts

@@ -18,6 +18,7 @@ export const APPLICATION_FRAGMENT = gql`
       id
       latestAvailableVersion
       sourceType
+      logoUrl
     }
     canBeUninstalled
     defaultRoleId