Fixed parsing error with sigma baryons

[MicahGale]

Pull Request Checklist for MontePy

Description

This fixes a bug where sigma baryon particles can't be parsed properly, these are + and -, but the biggest issue is that are special character particles, and should have been parsed as PARTICLE_SPECIAL tokens. However, due to token precedence this was not happening. This fixes this by changing token precedence, fixing a bug with ParticleNode for special character particles, and addressed a few issues from token precedence.

Fixes #671

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General Checklist

• I have performed a self-review of my own code.
• The code follows the standards outlined in the development documentation.
• I have formatted my code with black version 25.
• I have added tests that prove my fix is effective or that my feature works (if applicable).

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Documentation Checklist

• ~I have documented all added classes and methods.
• For infrastructure updates, I have updated the developer's guide.
• For significant new features, I have added a section to the getting started guide.

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First-Time Contributor Checklist

• If this is your first contribution, add yourself to pyproject.toml if you wish to do so.

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Additional Notes for Reviewers

Ensure that:

• The submitted code is consistent with the merge checklist outlined here.
• The PR covers all relevant aspects according to the development guidelines.
• 100% coverage of the patch is achieved, or justification for a variance is given.

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📚 Documentation preview 📚: https://montepy--673.org.readthedocs.build/en/673/

[tjlaboss]

MCNP 6.3 Manual Table 4.3:

Dear Mr. President, there are too many particles these days. Please eliminate 3.