add transformer

[morning9393]

add multi-agent transformer architecture as a base model support

[codecov]

Codecov Report

Merging #51 (3c7efcc) into main (4e22e33) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main      #51   +/-   ##
=======================================
  Coverage   82.19%   82.19%           
=======================================
  Files          36       36           
  Lines        2482     2482           
=======================================
  Hits         2040     2040           
  Misses        442      442           

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[lgtm-com]

This pull request introduces 2 alerts when merging 3c7efcc into 4e22e33 - view on LGTM.com

new alerts:

• 1 for Unused import
• 1 for Module is imported with 'import' and 'import from'

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