Allow supporting nested list

[nparashar150]

Describe the issue
Nested lists do not get rendered properly. When adding a sublist, it merges everything into the parent list without keeping proper hierarchy.

To Reproduce
Steps to reproduce the behavior:

1. Create a list with nested sublists.
2. Compile to HTML.
3. See that the nested lists are not rendered correctly.

Expected behavior
Nested lists should render as indented sublists, maintaining their structure.

Additional context
Should support multiple levels of nested lists with consistent indentation and structure.