Activate global signer state machine

[jacinta-stacks]

Closes https://github.com/stx-labs/core-epics/issues/82

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.54%. Comparing base (201ddd9) to head (237b7fd).
⚠️ Report is 2 commits behind head on develop.

❌ Your project check has failed because the head coverage (72.54%) is below the target coverage (80.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #6742      +/-   ##
===========================================
- Coverage    76.86%   72.54%   -4.33%     
===========================================
  Files          579      579              
  Lines       360066   360068       +2     
===========================================
- Hits        276782   261219   -15563     
- Misses       83284    98849   +15565     

Files with missing lines	Coverage Δ
stacks-signer/src/v0/signer_state.rs	70.03% <ø> (+3.36%)	⬆️

... and 289 files with indirect coverage changes

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