👷🏻 ✅ Add abs helpers to int interactions libraries

[tommyrharper]

Description

Add abs helper functions to all int types, including abs128 and abs for int128 types. abs returns 256 sized types and abs128 returns 128 sized types, mirroring the functionality in the MathUtil in the snx repo.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 21 lines in your changes are missing coverage. Please review.

Project coverage is 0.00%. Comparing base (dc0616c) to head (5f33723).

❗ Current head 5f33723 differs from pull request most recent head 671a2d9. Consider uploading reports for the commit 671a2d9 to get more accurate results

Files	Patch %	Lines
src/Int128/USDPerBaseInt128/Interactions.sol	0.00%	3 Missing ⚠️
src/Int128/USDPerQuantoInt128/Interactions.sol	0.00%	3 Missing ⚠️
src/Int128/BaseInt128/Interactions.sol	0.00%	2 Missing ⚠️
src/Int128/BaseQuantoPerUSDInt128/Interactions.sol	0.00%	2 Missing ⚠️
src/Int128/QuantoInt128/Interactions.sol	0.00%	2 Missing ⚠️
src/Int128/USDInt128/Interactions.sol	0.00%	2 Missing ⚠️
src/Int256/USDPerBaseInt256/Interactions.sol	0.00%	2 Missing ⚠️
src/Int256/BaseInt256/Interactions.sol	0.00%	1 Missing ⚠️
src/Int256/BaseQuantoPerUSDInt256/Interactions.sol	0.00%	1 Missing ⚠️
src/Int256/QuantoInt256/Interactions.sol	0.00%	1 Missing ⚠️
... and 2 more

Additional details and impacted files

@@          Coverage Diff          @@
##            main      #4   +/-   ##
=====================================
  Coverage   0.00%   0.00%           
=====================================
  Files         39      39           
  Lines        185     206   +21     
  Branches      17      17           
=====================================
- Misses       185     206   +21     

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