feat: add llms.txt markdown parser

tests/test_llms_txt_parser.py

@@ -0,0 +1,34 @@
+import pytest
+from cli.llms_txt_parser import LlmsTxtParser
+
+def test_parse_markdown_sections():
+    """Test parsing markdown into page sections"""
+    sample_content = """# Getting Started
+
+Welcome to the docs.
+
+## Installation
+
+Run: npm install
+
+## Usage
+
+Import the library:
+
+```javascript
+import { app } from 'framework'
+```
+
+# API Reference
+
+Main API documentation here.
+"""
+
+    parser = LlmsTxtParser(sample_content)
+    pages = parser.parse()
+
+    assert len(pages) >= 2
+    assert pages[0]['title'] == 'Getting Started'
+    assert pages[1]['title'] == 'API Reference'
+    assert len(pages[0]['code_samples']) == 1
+    assert pages[0]['code_samples'][0]['language'] == 'javascript'