chore(types): lint types

[TheAlexLichter]

This PR provides linting support for Nuxt's typescript types.

As my TS skills are not the best, I'd love to have some eyes on the PR 😋

Types of changes

• Internal setup improvement

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.

[codecov-io]

Codecov Report

Merging #8630 (0d0a9f4) into dev (1405968) will increase coverage by 0.04%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##              dev    #8630      +/-   ##
==========================================
+ Coverage   66.01%   66.05%   +0.04%     
==========================================
  Files          92       92              
  Lines        4013     4010       -3     
  Branches     1105     1104       -1     
==========================================
  Hits         2649     2649              
+ Misses       1097     1095       -2     
+ Partials      267      266       -1     

Flag	Coverage Δ
unittests	66.05% <ø> (+0.04%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
packages/webpack/src/utils/style-loader.js	78.57% <0.00%> (+3.99%)	⬆️

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