[MM-51854] Onboarding Role selection screen (#23121)

Co-authored-by: Mattermost Build <build@mattermost.com>

webapp/platform/types/src/setup.ts

@@ -3,5 +3,6 @@
 
 export type CompleteOnboardingRequest = {
     organization: string;
+    role?: string;
     install_plugins: string[];
 }

webapp/platform/types/src/work_templates.ts

@@ -96,3 +96,5 @@ export enum Visibility {
     Public = 'public',
     Private = 'private',
 }
+
+export const CategoryOther = 'other'