refactor: migrate interfaces to dedicated directory

Reorganizes TypeScript interfaces into a modular structure:
- Create dedicated interfaces directory with specialized files
- Split interfaces by domain (claims, common, limits, records, user)
- Update imports in endorserServer.ts to use new interface locations
- Replace 'any' types with 'unknown' for better type safety
- Add proper type imports and exports

This improves code organization and maintainability by:
- Centralizing interface definitions
- Reducing file size of endorserServer.ts
- Making interface relationships more explicit
- Improving type safety with stricter types

src/views/OnboardMeetingMembersView.vue

@@ -13,7 +13,7 @@
       class="mt-16 text-center text-4xl bg-slate-400 text-white w-14 py-2.5 rounded-full mx-auto"
       v-if="isLoading"
     >
-      <fa icon="spinner" class="fa-spin-pulse"></fa>
+      <font-awesome icon="spinner" class="fa-spin-pulse"></font-awesome>
     </div>
 
     <!-- Error State -->