Implement "node:module"'s findSourceMap and SourceMap class (#20863)

Co-authored-by: Claude <claude@anthropic.ai>
Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: Jarred-Sumner <709451+Jarred-Sumner@users.noreply.github.com>

bench/snippets/source-map.js

@@ -0,0 +1,28 @@
+import { SourceMap } from "node:module";
+import { readFileSync } from "node:fs";
+import { bench, run } from "../runner.mjs";
+const json = JSON.parse(readFileSync(process.argv.at(-1), "utf-8"));
+
+bench("new SourceMap(json)", () => {
+  return new SourceMap(json);
+});
+
+const map = new SourceMap(json);
+
+const toRotate = [];
+for (let j = 0; j < 10000; j++) {
+  if (map.findEntry(0, j).generatedColumn) {
+    toRotate.push(j);
+    if (toRotate.length > 5) break;
+  }
+}
+let i = 0;
+bench("findEntry (match)", () => {
+  return map.findEntry(0, toRotate[i++ % 3]).generatedColumn;
+});
+
+bench("findEntry (no match)", () => {
+  return map.findEntry(0, 9999).generatedColumn;
+});
+
+await run();