Prepare the sources for switching the linter from ESLint to Biome.
- Use template literals instead of string concatenation
- Use the ** operator instead of Math.pow
- Drop a redundant continue and annotate an untyped let
- Remove the eslint-disable-line comments
Migrate from tsc to tsdown for multi-format (ESM/CJS) builds.
Replace Prettier with Biome for formatting and linting.
Upgrade ESLint to flat config (v10) and TypeScript to v6.
Drop Yarn in favor of npm for package management.
Configure dual ESM/CJS exports with proper type declarations.
Add publishing configuration and release scripts.
Reformat source files to 2-space indentation.
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