Add verbatim with descriminators

[TheSignPainter98]

Problem description

The existing verbatim syntax is strange, only works for a single line and cannot contain any exclamation mark characters.

How this PR fixes the problem

This PR changes the verbatim syntax to use backticks with hash marks as discriminators:

``verbatim fragment``

``#verbatim fragment with `` inside#``

``
verbatim block
``

``#
verbatim block with
``
inside
#``

Check lists

• All tests pass
• No linting errors
• Correctly formatted