Show user role in company switcher

CompanyResource now includes user_role — the authenticated user's
Bouncer role title scoped to that company (e.g. "Owner"). Displayed
as a subtitle under each company name in the switcher dropdown.

resources/scripts-v2/types/domain/company.ts

@@ -17,6 +17,7 @@ export interface Company {
   address?: Address
   owner?: User
   roles: Role[]
+  user_role?: string | null
 }
 
 export interface CompanySetting {