refactor(server): config system (#11081)

packages/backend/server/src/global.d.ts

@@ -4,13 +4,26 @@ declare namespace Express {
   }
 }
 
+declare type Exact<T extends { [key: string]: unknown }> = {
+  [K in keyof T]: T[K];
+};
+
+declare type Leaf<T> = T & { __leaf: true };
+declare type NonLeaf<T> = T extends Leaf<infer V> ? V : T;
+
+declare type DeeplyEraseLeaf<T> = T extends Leaf<infer V> ? V
+ : 
+   {
+      [K in keyof T]: DeeplyEraseLeaf<T[K]>
+    }
+
 declare type PrimitiveType =
   | string
   | number
   | boolean
   | symbol
   | null
-  | undefined;
+  | undefined
 
 declare type UnionToIntersection<T> = (
   T extends any ? (x: T) => any : never
@@ -33,6 +46,10 @@ declare type DeepPartial<T> =
           }
         : T;
 
+declare type DeepReadonly<T> = {
+  readonly [K in keyof T]: T[K] extends object ? DeepReadonly<T[K]> : T[K];
+};
+
 declare type AFFiNEModule =
   | import('@nestjs/common').Type
   | import('@nestjs/common').DynamicModule;