Fixed Parser bug with Source Definition

[MicahGale]

Description

This was a parser bug fix that ultimately led to some bigger infrastructure upgrades.

So #396 was silent because it was able to log errors with parsing, recover, and then parse something slightly meaningful. Changes made to fix this:

1. Check the error log with every parsing, and return None if there are any errors. This triggers higher up error handling.
2. Eliminated the need for stub montepy.data_input classes for switching out parsers. Instead implemented _load_correct_parser which updates self._parser based on the Input classifier.
3. sdef has a lot of d1 etc which is interpreted as a particle and a number in a ListNode. Modified append to never_pad d on formatting based on there being no trailing space.
4. Added flag to ListNode.append to only add never_pad during the parsing step
5. Made ListNode also respect never_pad
6. Changed logic around Jumps not being never_pad
7. Fixed the parser by making a hacking DataParser subclass that parses inputs that are only key-value pairs.
8. Added all sdef keywords to the tokens to recognize them.

Fixes #396, Fixes #427.

Checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation (if applicable)
• I have added tests that prove my fix is effective or that my feature works (if applicable)

[MicahGale]

#396 replicated with: https://github.com/idaholab/MontePy/actions/runs/9766216160/job/26958658566?pr=431 and 292dcef

[tjlaboss]

Looks good unless I've misunderstood anything in the comments I've left.