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_options.spec.ts

@@ -0,0 +1,15 @@
+import { test } from "./helpers/test_helper";
+
+test("switching turbo edits saves the right setting", async ({ po }) => {
+  await po.setUpDyadPro();
+  const proModesDialog = await po.openProModesDialog({
+    location: "home-chat-input-container",
+  });
+  await po.snapshotSettings();
+  await proModesDialog.setTurboEditsMode("classic");
+  await po.snapshotSettings();
+  await proModesDialog.setTurboEditsMode("search-replace");
+  await po.snapshotSettings();
+  await proModesDialog.setTurboEditsMode("off");
+  await po.snapshotSettings();
+});