Tabs and indentation in lists not working correctly

[Angel09-git]

Issue Description:
When converting RTF content to HTML, tabs (\tab) and indentations within lists are not correctly recognized or represented in the resulting HTML.

Steps to Reproduce:

1. Provide RTF content containing tabs and indentations in a list.
2. Convert the RTF content to HTML using RtfPipe.
3. Observe the HTML output for incorrect handling of tabs and indentations.

Example RTF:
example.txt

Output HTML:
exampleHtml.txt