Reorganize app workspaces and align Admin architecture

apps/backend/app/base_modules/Role/model/role.ts

@@ -0,0 +1,13 @@
+import { BaseModel, column } from '@adonisjs/lucid/orm'
+import { DateTime } from 'luxon'
+
+export default class Role extends BaseModel {
+  static searchable = {
+    string: ['name'],
+    number: ['id'],
+  }
+  @column({ isPrimary: true }) declare id: number
+  @column() declare name: string
+  @column.dateTime({ columnName: 'created_at' }) declare createdAt: DateTime | null
+  @column.dateTime({ columnName: 'updated_at' }) declare updatedAt: DateTime | null
+}