chore: creating docs for topos-tce

[Freyskeyd]

Description

This PR is adding some doc to the topos-tce library.

PR Checklist:

• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added or updated tests that comprehensively prove my change is effective or that my feature works

[codecov]

Codecov Report

Attention: Patch coverage is 94.11765% with 1 lines in your changes are missing coverage. Please review.

Project coverage is 71.95%. Comparing base (96e862f) to head (a2273b2).

Files	Patch %	Lines
crates/topos-tce/src/lib.rs	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #476      +/-   ##
==========================================
- Coverage   71.96%   71.95%   -0.01%     
==========================================
  Files         225      224       -1     
  Lines       12659    12653       -6     
==========================================
- Hits         9110     9105       -5     
+ Misses       3549     3548       -1     

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