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/error_stack.ts

@@ -1,60 +1,10 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 // Some of the code here is adapted directly from V8 and licensed under a BSD
 // style license available here: https://github.com/v8/v8/blob/24886f2d1c565287d33d71e4109a53bf0b54b75c/LICENSE.v8
-import { sendSync } from "./dispatch_json.ts";
+import { applySourceMap, Location } from "./ops/errors.ts";
 import { assert } from "./util.ts";
 import { exposeForTest } from "./internals.ts";
 
-export interface Location {
-  /** The full url for the module, e.g. `file://some/file.ts` or
-   * `https://some/file.ts`. */
-  filename: string;
-
-  /** The line number in the file.  It is assumed to be 1-indexed. */
-  line: number;
-
-  /** The column number in the file.  It is assumed to be 1-indexed. */
-  column: number;
-}
-
-/** Given a current location in a module, lookup the source location and
- * return it.
- *
- * When Deno transpiles code, it keep source maps of the transpiled code.  This
- * function can be used to lookup the original location.  This is automatically
- * done when accessing the `.stack` of an error, or when an uncaught error is
- * logged.  This function can be used to perform the lookup for creating better
- * error handling.
- *
- * **Note:** `line` and `column` are 1 indexed, which matches display
- * expectations, but is not typical of most index numbers in Deno.
- *
- * An example:
- *
- *       const orig = Deno.applySourceMap({
- *         location: "file://my/module.ts",
- *         line: 5,
- *         column: 15
- *       });
- *       console.log(`${orig.filename}:${orig.line}:${orig.column}`);
- *
- */
-export function applySourceMap(location: Location): Location {
-  const { filename, line, column } = location;
-  // On this side, line/column are 1 based, but in the source maps, they are
-  // 0 based, so we have to convert back and forth
-  const res = sendSync("op_apply_source_map", {
-    filename,
-    line: line - 1,
-    column: column - 1
-  });
-  return {
-    filename: res.filename,
-    line: res.line + 1,
-    column: res.column + 1
-  };
-}
-
 /** Mutate the call site so that it returns the location, instead of its
  * original location.
  */