Add syntax highlighting for better readability

[dpatlut]

Describe the bug
Currently, when Ask Astro returns code, it does not give it any different highlighting or color than the regular text it returns (other than being bolded). This makes it harder to parse and understand.

Version

• OS: N/A

To Reproduce
Steps to reproduce the behavior:

1. Run Ask-Astro website
2. Ask it to return any code for a DAG
3. See output

Expected behavior
Python syntax highlighted a different color

Screenshots

Additional context
N/A