feat: implement fuzzy search and replace functionality with Levenshtein distance

- Added `applySearchReplace` function to handle search and replace operations with fuzzy matching capabilities.
- Introduced tests for various scenarios including fuzzy matching with typos, exact matches, and handling whitespace differences.
- Created a parser for search/replace blocks to facilitate the new functionality.
- Updated prompts for search-replace operations to clarify usage and examples.
- Added utility functions for text normalization and language detection based on file extensions.
- Implemented a minimal stdio MCP server for local testing with tools for adding numbers and printing environment variables.

e2e-tests/turbo_edits_v2.spec.ts

@@ -0,0 +1,49 @@
+import { testSkipIfWindows } from "./helpers/test_helper";
+
+testSkipIfWindows("turbo edits v2 - search-replace dump", async ({ po }) => {
+  await po.setUpDyadPro();
+  const proModesDialog = await po.openProModesDialog({
+    location: "home-chat-input-container",
+  });
+  await proModesDialog.setTurboEditsMode("search-replace");
+  await proModesDialog.close();
+  await po.sendPrompt("[dump]");
+  await po.snapshotServerDump("request");
+  await po.snapshotServerDump("all-messages");
+});
+
+testSkipIfWindows("turbo edits v2 - search-replace approve", async ({ po }) => {
+  await po.setUpDyadPro();
+  const proModesDialog = await po.openProModesDialog({
+    location: "home-chat-input-container",
+  });
+  await proModesDialog.setTurboEditsMode("search-replace");
+  await proModesDialog.close();
+  await po.sendPrompt("tc=turbo-edits-v2");
+  await po.snapshotMessages();
+  await po.approveProposal();
+  await po.snapshotAppFiles({
+    name: "after-search-replace",
+    files: ["src/pages/Index.tsx"],
+  });
+});
+
+testSkipIfWindows(
+  "turbo edits v2 - search-replace fallback",
+  async ({ po }) => {
+    await po.setUpDyadPro();
+    const proModesDialog = await po.openProModesDialog({
+      location: "home-chat-input-container",
+    });
+    await proModesDialog.setTurboEditsMode("search-replace");
+    await proModesDialog.close();
+    await po.sendPrompt("tc=turbo-edits-v2-trigger-fallback");
+    await po.snapshotServerDump("request");
+    await po.snapshotMessages({ replaceDumpPath: true });
+    await po.approveProposal();
+    await po.snapshotAppFiles({
+      name: "after-search-replace-fallback",
+      files: ["src/pages/Index.tsx"],
+    });
+  },
+);