Add new templates and tests for improved functionality

- Created index.html template for the homepage with service cards and partner logos.
- Added page_from_md.html template for rendering pages from markdown.
- Developed services.html template detailing various services offered.
- Implemented tests for link handling in markdown, ensuring external links open in new tabs and internal links function correctly.
- Enhanced markdown parser tests to validate heading extraction, content rendering, and link safety.
- Introduced utility tests for template rendering, HTML minification, and JavaScript minification.

Co-authored-by: Copilot <copilot@github.com>

tests/test_unsafe_links.py

@@ -0,0 +1,15 @@
+from lib.markdown_parser import markdown_to_html_lines
+
+
+def test_javascript_link_neutralized():
+    md = '[bad](javascript:alert(1))'
+    html = markdown_to_html_lines(md)
+    assert 'href="#unsafe"' in html
+    assert 'javascript:' not in html
+
+
+def test_data_link_neutralized():
+    md = '[bad](data:text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg==)'
+    html = markdown_to_html_lines(md)
+    assert 'href="#unsafe"' in html
+    assert 'data:' not in html