Update eslintrc for TypeScript

[zachmargolis]

I had an issue in a562b69 where I was shadowing the h function, which ended up breaking JSX parsing

So then I realized there should be a lint for shadowing variables like that... so this is my attempt to try to get eslint wired to catch that.

Current problem is a bunch of "defined but never used" errors that are not correct....

identity-reporting/src/daily-auths-report.tsx
  2:10  error  'h' is defined but never used  no-unused-vars

identity-reporting/src/observablehq.d.ts
  2:12  error  'plot' is defined but never used   no-unused-vars
  2:17  error  'args' is defined but never used   no-unused-vars
  4:12  error  'ruleY' is defined but never used  no-unused-vars
  4:18  error  'args' is defined but never used   no-unused-vars
  5:12  error  'barY' is defined but never used   no-unused-vars
  5:17  error  'data' is defined but never used   no-unused-vars
  5:28  error  'args' is defined but never used   no-unused-vars

identity-reporting/src/report-filter-controls.tsx
  1:25  error  'h' is defined but never used  no-unused-vars

identity-reporting/src/routes/index.tsx
  1:10  error  'h' is defined but never used  no-unused-vars

identity-reporting/src/routes/report.tsx
  1:17  error  'h' is defined but never used  no-unused-vars

identity-reporting/src/table.tsx
   1:10  error  'h' is defined but never used  no-unused-vars
  12:22  error  'n' is defined but never used  no-unused-vars

✖ 13 problems (13 errors, 0 warnings)

The one that is tripping me up is the n argument from table.jsx ...

  numberFormatter?: (n: number) => string;

[aduth]

For 'h' is defined but never used, we can use eslint-plugin-react, which has an override for this:

https://github.com/yannickcr/eslint-plugin-react/blob/master/docs/rules/jsx-uses-react.md

Alternatively, it'd be nice if we could move to the automatic runtime. ESBuild's support for it is limited at best, currently recommended to use the inject option, only available for build. Vite has decent support for it through the jsxInject option, though it's another one of those things where recreating it in the tests is our responsibility.

tl;dr, if we want auto-import:

1. https://github.com/aduth/liftsheet/blob/c203ec1/vite.config.ts#L10
2. https://github.com/aduth/liftsheet/blob/c203ec1/mocha.setup.ts#L7

[aduth]

For the "no unused vars" in the type definitions, looks to be a combination of:

• The methods may be expected to be exported
• The @typescript-eslint/eslint-plugin includes a "replacement" no-unused-vars to account for unused vars in type declaration files.

[zachmargolis]

Thanks for helping with these!