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/plugins.ts

@@ -1,4 +1,4 @@
-import { sendSync } from "./dispatch_json.ts";
+import { sendSync } from "./ops/dispatch_json.ts";
 import { core } from "./core.ts";
 
 export interface AsyncHandler {