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/InviteOneAcceptView.vue

@@ -5,7 +5,7 @@
       v-if="checkingInvite"
       class="text-lg text-center font-light relative px-7"
     >
-      <fa icon="spinner" class="fa-spin-pulse" />
+      <font-awesome icon="spinner" class="fa-spin-pulse" />
     </div>
     <div v-else class="text-center mt-4">
       <p>That invitation did not work.</p>