feat(core): re-set sideEffects: false, remove last side effect import

- safari now supports web worker initialized from another web worker
- import is happening anyway in code that imports Worker from @wixc3/isomorphic-worker/worker

packages/core/package.json

@@ -30,5 +30,6 @@
   "license": "MIT",
   "publishConfig": {
     "access": "public"
-  }
+  },
+  "sideEffects": false
 }

packages/core/src/run-engine-app.ts

@@ -1,8 +1,3 @@
-/**
- * Extends globalThis.Worker with a polyfill for web workers in safari.
- */
-import '@wixc3/isomorphic-worker/worker';
-
 import { RuntimeEngine } from './runtime-engine.js';
 import type { IRunOptions, TopLevelConfig } from './types.js';
 import type { AnyEnvironment, FeatureClass } from './entities/index.js';

packages/runtime-node/src/metrics-utils.ts

@@ -1,6 +1,6 @@
 import type { PerformanceMetrics } from './types.js';
 import type { ChildProcess } from 'node:child_process';
-import { Worker } from '@wixc3/isomorphic-worker/worker';
+import type { Worker } from '@wixc3/isomorphic-worker/worker';
 import { isValidRpcResponse, rpcCall, getNextMessageId, bindRpcListener } from './micro-rpc.js';
 
 export function bindMetricsListener(