Reorganize app workspaces and align Admin architecture

package.json

@@ -11,7 +11,6 @@
   },
   "workspaces": [
     "apps/*",
-    "backend",
     "packages/*",
     "packages/services/*",
     "packages/design-system/*"
@@ -34,13 +33,7 @@
   },
   "imports": {},
   "devDependencies": {
-    "@adonisjs/eslint-config": "2.0.0",
-    "@adonisjs/prettier-config": "1.4.4",
     "@ianvs/prettier-plugin-sort-imports": "4.4.1",
-    "@japa/api-client": "^3.2.1",
-    "@japa/assert": "^4.2.0",
-    "@japa/runner": "^5.3.0",
-    "@japa/spec-reporter": "^1.3.3",
     "@types/node": "22.15.23",
     "@typescript-eslint/eslint-plugin": "^8.64.0",
     "@typescript-eslint/parser": "^8.64.0",
@@ -67,7 +60,7 @@
       "node scripts/eslint-with-typescript6.cjs --fix",
       "prettier --write"
     ],
-    "backend/**/*.{ts,js}": [
+    "apps/backend/**/*.{ts,js}": [
       "node scripts/eslint-with-typescript6.cjs --fix",
       "prettier --write"
     ],