Introduce new linting rules for Figma's new dynamic page loading

[six7]

Does any usage of figma.variables.getLocalVariables() need to be replaced going forward? Maybe a custom ESLint rule or something could be useful for this to prevent the bug from being reintroduced in the future.

Yes! There's a eslint rule by figma provided here: https://www.figma.com/plugin-docs/migrating-to-dynamic-loading/

we should add that

Originally posted by @six7 in #3137 (comment)

[six7]

@macintoshhelper are you still working on this? Fine if not, please unassign then

[macintoshhelper]

I've unassigned myself for now. I was having issues with my local ESLint setup in VSCode which were blocking this. My ESLint setup appears to be fixed with this:

.vscode/settings.json

{
// ...
"eslint.workingDirectories": [
      {
          "mode": "location"
      }
  ],
// ...
}

And adding this to .eslintrc.js:

{
// ...
  parser: '@typescript-eslint/parser',
// ...
}