chore: setup path alias

[hi-ogawa]

Thinking about introducing path alias, or at least testing codemod to achieve this in one shot.
Probably we want to wait for imports subpath auto-completion on typescript:

• Add auto-import for the package.json imports field microsoft/TypeScript#55015

todo

• codemod
• vite/remix
• vitest
• playwright
  • looks like cannot resolve "#" + ".ts" extension, which is very reasonable behavior in terms of resolution spec...
  • can we force to use tsx loader instead of playwright's own loader?
    https://github.com/microsoft/playwright/blob/2d5488d8e31dcd3f04dbefc9e7d4f1c4b25fc8bc/packages/playwright/src/util.ts#L291
  • not sure if this is legit but NODE_OPTIONS='--import tsx/esm' PW_DISABLE_TS_ESM=1 works... 6ae7a7e
• tsx
• icheck-ts feat(icheck-ts): support custom resolution via import.meta.resolve + report unresolved import error js-utils#184
• isort-ts feat: order internal "#" imports after external isort-ts#36