Bump smart-round to newest deps and TS

[gndelia]

This PR

• bumps smart-round to be implemented in Typescript
• bumps all dependencies, adds better test coverage (and uses vitest which has native support for typescript tests)
• Removes the deprecated dependency accounting, and replaces its usage with using the native Intl.NumberFormat
• Add better CI and tooling process (Github Actions instead of Travis, adding knip, prettier, etc)
• Exports an ESM build, although it still provides a CommonJs build.

Closes #2
Related to hemilabs/ui-monorepo#860

Version is bumped to 2.0.0 due to the ESM support and because I switched the exported function to be a named export (import { smartRound } from 'smart-round' instead of import smartRound from 'smart-round')