Typescript declarations with typescript compiler

[Munter]

Here's another take on getting type inference, checks and type definitions. This time using typescripts jsdoc support. See https://dev.to/open-wc/generating-typescript-definition-files-from-javascript-5bp2

Upsides:

• Much better inference and completion in vscode
• Linter feedback
• Seemingly more complete types output

Downsides:

• I can't make it not check node_modules
• The only way to reference types defined in other files is breaking jsdoc generation