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/components/OfferDialog.vue

@@ -21,7 +21,7 @@
           @click="decrement()"
           v-if="amountInput !== '0'"
         >
-          <fa icon="chevron-left" />
+          <font-awesome icon="chevron-left" />
         </div>
         <input
           data-testId="inputOfferAmount"
@@ -33,7 +33,7 @@
           class="rounded-r border border-slate-400 bg-slate-200 px-4 py-2"
           @click="increment()"
         >
-          <fa icon="chevron-right" />
+          <font-awesome icon="chevron-right" />
         </div>
       </div>
       <div class="mt-4 flex justify-center">