Upgrade TypeScript

[axelboc]

TypeScript 5.5 can:

• infer type prediactes, notably when filtering arrays - e.g. myArr.filter(foo => !!foo).map(foo => foo.toString())
• better narrow down obj[key] expressions
• check the syntax of regular expressions
• identify missing type annotations that may prevent future tools from type-checking in parallel with emitting declaration files (a bit early days to enable it, though)

TypeScript 5.6 can:

• catch condition that are always true or always false by mistake
• forbid side effect imports (too early to use due to ESLint)
• emit declarations without type-checking (too early to use, though)
• provide better code completions based on commit characters
• be configured to no longer suggest some auto-imports
  • I'm taking advantage of this to force VS Code to stop trying to import log from Node's console or from Three.js (so the console.log() snippet becomes the first suggestion)

[axelboc]

Not actually needed.

[axelboc]

Moved to tsconfig files in packages subfolders, where it is actually needed. This was causing issues in the storybook project.

[axelboc]

I linked to an article that discussed this, I think: https://johnnyreilly.com/typescript-5-importsnotusedasvalues-error-eslint-consistent-type-imports -- it's ESLint's job