docs: change the copyright from CNAI to ModelPack

[chlins]

This pull request updates the copyright statements across the codebase to reflect a change in project authorship from "The CNAI Authors" to "The ModelPack Authors". No functional or logic changes are included.

• Copyright and Licensing Updates:
  • Updated all copyright headers in source files under cmd/ and in Makefile and copyright.txt to reference "The ModelPack Authors" instead of "The CNAI Authors". [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20]

[gaius-qi]

LGTM

[gemini-code-assist]

Code Review

This pull request updates the copyright notices across the entire codebase, changing the attribution from 'The CNAI Authors' to 'The ModelPack Authors'. I have no further feedback to provide.