feat: 移除应用注册相关方法，添加驱动程序和自定义字段类型注册功能

Author: hotlong

packages/objectql/src/registry.ts

@@ -70,21 +70,6 @@ export class SchemaRegistry {
     return this.listItems<ServiceObject>('object');
   }
 
-  /**
-   * App Helpers
-   */
-  static registerApp(app: App) {
-    this.registerItem('app', app, 'name');
-  }
-
-  static getApp(name: string): App | undefined {
-    return this.getItem<App>('app', name);
-  }
-
-  static getAllApps(): App[] {
-    return this.listItems<App>('app');
-  }
-
   /**
    * Plugin Helpers
    */

packages/spec/src/system/manifest.zod.ts

@@ -137,6 +137,37 @@ export const ManifestSchema = z.object({
        input: z.any().optional().describe('Input validation schema'),
        output: z.any().optional().describe('Output schema'),
     })).optional().describe('Exposed server actions'),
+
+    /**
+     * Register Storage Drivers.
+     * Enables connecting to new types of datasources.
+     */
+    drivers: z.array(z.object({
+      id: z.string().describe('Driver unique identifier (e.g. "postgres", "mongo")'),
+      label: z.string().describe('Human readable name'),
+      description: z.string().optional(),
+    })).optional().describe('Driver contributions'),
+
+    /**
+     * Register Custom Field Types.
+     * Extends the data model with new widget types.
+     */
+    fieldTypes: z.array(z.object({
+      name: z.string().describe('Unique field type name (e.g. "vector")'),
+      label: z.string().describe('Display label'),
+      description: z.string().optional(),
+    })).optional().describe('Field Type contributions'),
+    
+    /**
+     * Register Custom Query Operators/Functions.
+     * Extends ObjectQL with new functions (e.g. distance()).
+     */
+    functions: z.array(z.object({
+      name: z.string().describe('Function name (e.g. "distance")'),
+      description: z.string().optional(),
+      args: z.array(z.string()).optional().describe('Argument types'),
+      returnType: z.string().optional(),
+    })).optional().describe('Query Function contributions'),
   }).optional().describe('Platform contributions'),
 
   /** 

packages/spec/src/system/plugin.zod.ts

@@ -132,6 +132,20 @@ export const PluginContextSchema = z.object({
     router: RouterSchema,
     scheduler: SchedulerSchema.optional(),
   }).describe('App Runtime Capabilities'),
+
+  /**
+   * Driver Registry.
+   * Allows plugins to register new storage drivers.
+   * 
+   * @example
+   * context.drivers.register(new MongoDriver());
+   */
+  drivers: z.object({
+    register: z.function()
+        //.args(DriverInterfaceSchema) // Avoid circular dependency, use any or runtime check
+        .args(z.any()) 
+        .describe('Register a new driver instance'),
+  }).describe('Driver Management'),
 });
 
 /**