feat(cpa): add support for bun package manager in v3 installer

[Arctomachine]

Description

It adds support for bun package manger in v3, enabled with --use-bun flag. Related: #6932 (for v2)

• [x] I have read and understand the CONTRIBUTING.md document in this repository.

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)

Checklist:

• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] Existing test suite passes locally with my changes
• [ ] I have made corresponding changes to the documentation