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/RecentOffersToUserView.vue

@@ -6,7 +6,7 @@
     <div id="ViewBreadcrumb" class="mb-8">
       <h1 class="text-lg text-center font-light relative px-7">
         <!-- Back -->
-        <fa
+        <font-awesome
           icon="chevron-left"
           @click="$router.back()"
           class="fa-fw text-lg text-center px-2 py-1 absolute -left-2 -top-1"
@@ -20,7 +20,7 @@
       <p class="mt-2">
         You can start the cycle on the
         <router-link to="/contacts" class="text-blue-500">
-          Contacts page <fa icon="users" />
+          Contacts page <font-awesome icon="users" />
         </router-link>
         with an "Offer" directly to someone. Hopefully you'll find a common
         interest!
@@ -58,7 +58,7 @@
             :to="{ path: '/claim/' + encodeURIComponent(offer.jwtId) }"
             class="text-blue-500"
           >
-            <fa icon="file-lines" class="pl-2 text-blue-500 cursor-pointer" />
+            <font-awesome icon="file-lines" class="pl-2 text-blue-500 cursor-pointer" />
           </router-link>
         </li>
       </ul>