feat: Add Typescript typings for server-core (#111)

* Add typings for server-core

* Add types to package.json

* Reuse DatabaseType for createDriver param

Author: dtslvr

packages/cubejs-server-core/core/index.d.ts

@@ -0,0 +1,25 @@
+declare module '@cubejs-backend/server-core' {
+  export function create(options?: CreateOptions): any;
+
+  export function createDriver(dbType: DatabaseType): DriverFactory;
+
+  export interface CreateOptions {
+    apiSecret?: string;
+    basePath?: string;
+    checkAuthMiddleware?: (req: any, res: any, next: any) => any;
+    contextToAppId?: any;
+    devServer?: boolean;
+    dbType?: DatabaseType;
+    driverFactory?: DriverFactory;
+    externalDriverFactory?: DriverFactory;
+    logger?: (msg: string, params: any) => void;
+    orchestratorOptions?: any;
+    repositoryFactory?: any;
+    schemaPath?: string;
+  }
+
+  export interface DriverFactory {
+  }
+
+  export type DatabaseType = 'athena' | 'bigquery' | 'clickhouse' | 'jdbc' | 'mongobi' | 'mssql' | 'mysql' | 'postgres' | 'redshift';
+}

packages/cubejs-server-core/package.json

@@ -10,6 +10,7 @@
     "test": "mocha"
   },
   "main": "core/index.js",
+  "types": "core/index.d.ts",
   "files": [
     "core",
     "playground"