tech: Extensive refactor interface for modern swift concurrency

[surpher]

• Refactors implementation around libpact_ffi moving more responsibility into ffi
• Fixes support scripts
• Splits github actions workflows and updates runner version(s)

Co-authored by @orj

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 0% with 633 lines in your changes are missing coverage. Please review.

Project coverage is 0.00%. Comparing base (50c1300) to head (ca26558). Report is 8 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #11 +/- ## ====================================== Coverage 0.00% 0.00% ====================================== Files 14 17 +3 Lines 323 719 +396 ====================================== - Misses 323 719 +396 ```