chore: one function per module

[aleclarson]

Description

By giving each function its own module, we gain some great benefits:

• New contributors can find their way around easier.

• Copy-pasting a function from Radashi is simpler than ever. To demonstrate this, let me explain the steps it now takes:

  1. Go to https://github.com/radashi-org/radashi
  2. Press the t key, then type the name of the function you wish to copy-paste
  3. Press the Enter key to navigate to the function's module
  4. Click the copy button or the download button
  5. All done! If the function relies on other Radashi functions, they're already imported from the radashi package specifier, so the copied function will work in your project immediately, no manual edits required.

• Easier than ever to run tests for a specific function. Just pass the function name to Vitest and it will fuzzy-match the right test file for you!

  # Run tests for `mapValues` in watch mode.
  pnpm vitest mapvalues
  
  # Run tests one time.
  pnpm vitest run mapvalues

Checklist

• Changes are covered by tests if behavior has been changed or added
• Tests have 100% coverage
• If code changes were made, the documentation (in the /docs directory) has been updated

Resolves