feat: composables docs

[ksted]

Why:

Closes: AB#80041

Describe your changes

Adds a VitePress docs site for web app composables.

Open warnings:

[warning] CookieGroup, defined in ./cookie.config.ts, is referenced by UseCookieReturn.cookieJson but not included in the documentation.
[warning] useProductRecommended, defined in ./composables/useProductRecommended/types.ts, is referenced by useProductRecommended.useProductRecommended but not included in the documentation.
[warning] CookieGroupFromNuxtConfig, defined in ./cookie.config.ts, is referenced by useCookieBar.useCookieBar.initialCookieJsonFromConfig but not included in the documentation.

Open errors (when exporting types in apps/web/composables/useProductRecommended/index.ts:

composables/useProductRecommended/index.ts:2:1 - error TS2308: Module './useProductRecommended' has already exported a member named 'useProductRecommended'. Consider explicitly re-exporting to resolve the ambiguity.

2 export * from './types';

It's important to note that the resulting documentation only considers explicitly exported functions. This means internal functions are excluded. This is by design.:

As far as TypeDoc is concerned, this is not documentable code, there's no way to document these. You could technically write a plugin to do this, but eww.... even more eww than documenting not exported functions...

In my opinion, we should handle this by extending the documentation of the exported function and keeping the internal annotations as slim as possible. For example, I feel like all the individual @example blocks could be removed. I would like to handle those changes separately, though.

Checklist before requesting a review

• My code follows the code style of this project.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.