perf(types): use homomorphic mapped type to reduce conditional branches

[m-shaka]

…anches

The author should do the following, if applicable

• [ ] Add tests
• [x] Run tests
• [x] bun run format:fix && bun run lint:fix to format the code
• [ ] Add TSDoc/JSDoc to document the code

Reduced conditional branches by using homomorphic mapped type. The number of type instantiation has dropped a bit and the definition became simpler than before

FYI

• https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-1.html#mapped-types-on-tuples-and-arrays
• https://andreasimonecosta.dev/posts/what-the-heck-is-a-homomorphic-mapped-type/

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 95.77%. Comparing base (66df4e1) to head (57aa0d8). Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #3440 +/- ## ======================================= Coverage 95.77% 95.77% ======================================= Files 155 155 Lines 9310 9310 Branches 2759 2773 +14 ======================================= Hits 8917 8917 Misses 393 393 ```

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[yusukebe]

@m-shaka

Good improvement. Thanks!