- covert `cSpell.json` to `cspell.config.yaml`
- break up the word list into multiple dictionary files
- fix spelling issues
- Enable spell checking code for non-test files
The `node16` module resolution requires imports to use the `.js` file
extension in type definitions.
`@rollup/plugin-typescript` is needed to make this work with the Vite
setup used by Mermaid.
The module option for Mermaid internally is set to `nodenext`. This is
needed to support `.json` imports. Note that setting `module` to
`node16` or `nodenext` implies a matching `moduleResolution` value.