Creder renamed to SerderACDC to match keripy convention

[daidoji]

Rationale

Creder is now called SerderACDC in keripy so renamed to match convention.

Testing

Just a rename so cargo test was the amount of testing I did.

For Reviewers

• Verify version bumped in Cargo.toml

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7cd5453) 95.42% compared to head (8dbb6e3) 95.42%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #166   +/-   ##
=======================================
  Coverage   95.42%   95.42%           
=======================================
  Files          32       32           
  Lines        3037     3037           
=======================================
  Hits         2898     2898           
  Misses        139      139           

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