Rename BFT to BTF across the bridge modules for consistency

[itsyaasir]

Issue ticket

Issue ticket link:

Checklist before requesting a review

Code conventions

• I have performed a self-review of my code
• Every new function is documented
• Object names are auto explicative
• The PR follows the project conventions
• The code follows the style guidelines of the project
• The code follows the project security best practices

Security

• The PR does not break APIs backward compatibility
• The PR does not break the stable storage backward compatibility

Testing

• Every function is properly unit tested
• I have added integration tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• IC endpoints are always tested through the canister_call! macro

[Maximkaaa]

I think these should be renamed also:

[Maximkaaa]

Yeah, those files from my screenshot got in there after you did search and replace. Sorry :-)