Feature/sql formatter (#81)

* feat(formatters): add SQL formatter with validate, beautify, and minify

- Add sql-formatter and node-sql-parser dependencies
- Implement dialect-aware formatting with exact, proxy, and format-only validation
- Register SqlFormatter under Formatters category

Made-with: Cursor

* feat(html-to-markdown): implement HTML to Markdown conversion tool

- Added HtmlToMarkdown component for converting HTML to GitHub-flavored Markdown.
- Integrated Turndown and turndown-plugin-gfm for robust HTML parsing and Markdown generation.
- Created configuration options for heading styles, list markers, and code block styles.
- Implemented clipboard functionality for easy HTML input.
- Added tests to ensure accurate conversion and error handling.

This tool enhances the text processing capabilities of the application, allowing users to easily convert HTML content into Markdown format.

---------

Co-authored-by: DrakeNguyen <drake.ha.nguyen@gmail.com>

Author: drakehanguyen

package.json

@@ -74,14 +74,18 @@
     "monaco-editor": "^0.55.1",
     "next": "^16.1.6",
     "next-themes": "^0.4.6",
+    "node-sql-parser": "^5.4.0",
     "qr-scanner": "^1.4.2",
     "qrcode": "^1.5.4",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
     "react-window": "^2.2.7",
     "shiki": "^3.23.0",
+    "sql-formatter": "^15.7.3",
     "tailwind-merge": "^3.5.0",
     "tailwindcss-animate": "^1.0.7",
+    "turndown": "^7.2.4",
+    "turndown-plugin-gfm": "^1.0.2",
     "uuid": "^13.0.0",
     "yaml": "^2.8.2"
   },
@@ -95,6 +99,7 @@
     "@types/node": "^20.19.37",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "@types/turndown": "^5.0.6",
     "@typescript-eslint/eslint-plugin": "^8.57.0",
     "@typescript-eslint/parser": "^8.57.0",
     "baseline-browser-mapping": "^2.10.8",