feat: optimize config loader

Signed-off-by: MiaoWoo <admin@yumc.pw>

packages/plugin/src/config/loader/json-loader.ts

@@ -0,0 +1,18 @@
+import { provideSingletonNamed } from '@ccms/container'
+
+import { PluginConfigLoader } from '../interfaces'
+
+const LOADER_TYPE_NAME = 'json'
+
+@provideSingletonNamed(PluginConfigLoader, LOADER_TYPE_NAME)
+export class JsonPluginConfig implements PluginConfigLoader {
+    type: string = LOADER_TYPE_NAME
+
+    load(content: string) {
+        return JSON.parse(content)
+    }
+
+    dump(variable: any): string {
+        return JSON.stringify(variable, undefined, 4)
+    }
+}