reorg: move JS ops implementations to cli/js/ops/, part 1 (#4264)

Following JS ops were moved to separate files in cli/js/ops directory:
- compiler
- dispatch_json
- dispatch_minimal
- errors
- fetch
- fs_events
- os
- random
- repl
- resources
- runtime_compiler
- runtime
- tty

cli/js/runtime_worker.ts

@@ -16,7 +16,7 @@ import {
   windowOrWorkerGlobalScopeProperties,
   eventTargetProperties
 } from "./globals.ts";
-import { sendSync } from "./dispatch_json.ts";
+import { sendSync } from "./ops/dispatch_json.ts";
 import { log } from "./util.ts";
 import { TextEncoder } from "./web/text_encoding.ts";
 import * as runtime from "./runtime.ts";