feat(unit): add unit management pages and form components

- Create new unit list and add pages under org-src feature
- Implement unit entry form with validation using zod
- Update error types to support readonly path property
- Refactor field component to use shared error type

app/components/pub/custom-ui/form/field.vue

@@ -1,12 +1,9 @@
 <script setup lang="ts">
-export interface XError {
-  message: string
-  [key: string]: any
-}
+import type { XErrors } from '~/types/error'
 
 defineProps<{
   id?: string
-  errors?: Record<string, XError>
+  errors?: XErrors
 }>()
 </script>
 
@@ -14,7 +11,7 @@ defineProps<{
   <div class="grow">
     <slot />
     <div v-if="id && errors?.[id]" class="field-error-info">
-      {{ errors[id].message }}
+      {{ errors[id]?.message }}
     </div>
   </div>
 </template>