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.

CONTRIBUTING.md

@@ -20,9 +20,23 @@ Dyad is an Electron app.
 npm install
 ```
 
+**Create the userData directory (required for database)**
+
+```sh
+# Unix/macOS/Linux:
+mkdir -p userData
+
+# Windows PowerShell (run only if folder doesn't exist):
+mkdir userData
+
+# Windows Command Prompt (run only if folder doesn't exist):
+md userData
+```
+
 **Apply migrations:**
 
 ```sh
+# Generate and apply database migrations
 npm run db:generate
 npm run db:push
 ```
@@ -33,6 +47,16 @@ npm run db:push
 npm start
 ```
 
+## Setup
+
+If you'd like to contribute a pull request, we highly recommend setting the pre-commit hooks which will run the formatter and linter before each git commit. This is a great way of catching issues early on without waiting to run the GitHub Actions for your pull request.
+
+Simply run this once in your repo:
+
+```sh
+npm run init-precommit
+```
+
 ## Testing
 
 ### Unit tests