Improve Markdown Response

This is a consolidated issue to beautify the Markdown response

- [x] Headings,Subheadings should have appropriate size
- [x] Links should be blue underlined
- [x] Text should be well formatted
- [ ] Code block should have proper highlighting


related to #22

Start at the Markdown response rendering entry point and review the related issue #22 for context. Check how headings, links, text, and code blocks are currently rendered; done means code blocks have proper syntax highlighting while the listed formatting remains intact.

Written by the indexing model from the issue text.