refactor!: do less when no formatting is needed, renames attributes - BREAKING

[sverweij]

Description

• stops doing a function call (or even importing the formatter) when no formatting is needed
• renames lots of things for clarity and grammatical correctness. The BREAKING bit: the changeType attribute in an IChange is now called type (BREAKING)
• with this, simplifies the format function to have 0 branches
• also ensures we use node:assert/strict always over node:assert

Motivation and Context

• when running this as a library function this reduces overhead, bot on import (as the formatting function is imported only then when it's needed) and at runtime (skipping 2 function calls and a lookup).
• clear and concise naming makes using the package easier.

As a side effect of this PR the distribution size of the package reduces from 6.1kB (17.1kB unpacked) to 5.9kb (16.9kB unpacked)

How Has This Been Tested?

• green ci
• adapted automated non-regression tests

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Documentation only change
• Refactor (non-breaking change which fixes an issue without changing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• 📖

  • My change doesn't require a documentation update, or ...
  • it does and I have updated it

• ⚖️

  • The contribution will be subject to The MIT license, and I'm OK with that.
  • The contribution is my own original work.
  • I am ok with the stuff in CONTRIBUTING.md.