Improve linear app (#20453)

- Add front component form to create linear issue
<img width="1512" height="831" alt="image"
src="https://github.com/user-attachments/assets/ffbb223f-30a8-4c64-ac6d-002c29b604c1"
/>
<img width="1512" height="829" alt="image"
src="https://github.com/user-attachments/assets/a5ed2464-35a9-4a60-804c-5f15eb0043b4"
/>

- improve marketplace Linear app page
<img width="1302" height="834" alt="image"
src="https://github.com/user-attachments/assets/cdec7ec2-953d-4a49-a797-5369834b03c1"
/>


- update admin settings to display non secret values
<img width="861" height="473" alt="image"
src="https://github.com/user-attachments/assets/41dadf02-aa5d-4eb6-befe-0ad8ad4049b2"
/>

packages/twenty-apps/internal/twenty-linear/src/application.config.ts

@@ -1,9 +1,6 @@
 import { defineApplication } from 'twenty-sdk/define';
-
-import {
-  APPLICATION_UNIVERSAL_IDENTIFIER,
-  DEFAULT_ROLE_UNIVERSAL_IDENTIFIER,
-} from 'src/constants/universal-identifiers';
+import { ABOUT_DESCRIPTION } from './constants/ABOUT_DESCRIPTION.md';
+import { APPLICATION_UNIVERSAL_IDENTIFIER } from 'src/constants/universal-identifiers';
 
 export default defineApplication({
   universalIdentifier: APPLICATION_UNIVERSAL_IDENTIFIER,
@@ -11,10 +8,19 @@ export default defineApplication({
   description:
     'Connect Linear to Twenty. Each workspace member connects their own Linear account; logic functions can then create issues and read team data on their behalf.',
   logoUrl: 'public/linear-logomark.svg',
-  defaultRoleUniversalIdentifier: DEFAULT_ROLE_UNIVERSAL_IDENTIFIER,
-  // OAuth client_id/secret live at the registration level (one OAuth app per
-  // Twenty server, configured by the server admin) — not per-workspace —
-  // so they're declared as serverVariables, not applicationVariables.
+  aboutDescription: ABOUT_DESCRIPTION,
+  applicationVariables: undefined,
+  author: 'Twenty',
+  category: 'Product management',
+  emailSupport: 'contact@twenty.com',
+  screenshots: [
+    'public/gallery/command-menu-item-1.png',
+    'public/gallery/command-menu-item-2.png',
+    'public/gallery/command-menu-item-3.png',
+    'public/gallery/command-menu-item-4.png',
+  ],
+  termsUrl: 'https://github.com/twentyhq/twenty?tab=License-1-ov-file#readme',
+  websiteUrl: 'https://www.twenty.com',
   serverVariables: {
     LINEAR_CLIENT_ID: {
       description: