feat/deno (#219)

* update bun version

* fix module manager's em reference

* add basic deno example

* finalize

app/src/data/entities/EntityManager.ts

@@ -67,6 +67,13 @@ export class EntityManager<TBD extends object = DefaultDB> {
       return new EntityManager(this._entities, this.connection, this._relations, this._indices);
    }
 
+   clear(): this {
+      this._entities = [];
+      this._relations = [];
+      this._indices = [];
+      return this;
+   }
+
    get entities(): Entity[] {
       return this._entities;
    }

app/src/modules/ModuleManager.ts

@@ -267,7 +267,9 @@ export class ModuleManager {
    ctx(rebuild?: boolean): ModuleBuildContext {
       if (rebuild) {
          this.rebuildServer();
-         this.em = new EntityManager([], this.connection, [], [], this.emgr);
+         this.em = this.em
+            ? this.em.clear()
+            : new EntityManager([], this.connection, [], [], this.emgr);
          this.guard = new Guard();
       }