Add comprehensive guide on building a Cursor-like AI code assistant

- Introduced a new documentation file detailing the implementation of an AI code assistant using LSP, code embeddings, and LLMs.
- Updated the Vitepress configuration to include a link to the new guide in the Penify Blogs section.
- Enhanced the index page to feature the new guide with a brief description.

Author: sumansaurabh

.vitepress/config.mts

@@ -68,6 +68,9 @@ export default defineConfig({
       {
         text: "Penify Blogs",
         items: [{
+          text: "🧩 Building a Cursor-like AI Code Assistant",
+          link: "/docs/building-cursor-like-ai-code-assistant.md",
+        },{
           text: "⚖️ Python Code Complexity Checkers",
           link: "/docs/python-code-complexity-checkers-comparison.md",
         },
@@ -153,10 +156,6 @@ export default defineConfig({
 	<g>
 		<path d="M463.996,126.864L340.192,3.061C338.231,1.101,335.574,0,332.803,0H95.726C67.724,0,44.944,22.782,44.944,50.784v410.434
 			c0,28.001,22.781,50.783,50.783,50.783h320.547c28.002,0,50.783-22.781,50.783-50.783V134.253
-			C467.056,131.482,465.955,128.824,463.996,126.864z M343.255,35.679l88.127,88.126H373.14c-7.984,0-15.49-3.109-21.134-8.753
-			c-5.643-5.643-8.752-13.148-8.751-21.131V35.679z M446.158,461.217c0,16.479-13.406,29.885-29.884,29.885H95.726
-			c-16.479,0-29.885-13.406-29.885-29.885V50.784c0.001-16.479,13.407-29.886,29.885-29.886h226.631v73.021
-			c-0.002,13.565,5.28,26.318,14.871,35.909c9.592,9.592,22.345,14.874,35.911,14.874h73.018V461.217z"/>
 	</g>
 </g>
 <g>