BREAKING CHANGE: refactored into freeze-code.api usage

[AlejandroSuero]

Description

Now it will use require("freeze-code.utils.api") instead of require("freeze-code")

Type of change

Please delete options that are not relevant.

• Breaking change (fix or feature that would cause existing functionality to not
  work as expected)
• This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide
instructions so we can reproduce. Please also list relevant details about your configuration

• make test
• make test-nvim

Configuration:

• Neovim version (nvim --version): v0.10.0
• Operating system and version: MacOS 14.5 (23F79)

Checklist

• My code follows the style guidelines of this project (stylua)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I did read the CODE OF CONDUCT
  and I agree to follow it.