fix: make item drafts mutable

[pawelblaszczyk5]

Closes #407

I wasn't sure whether it's fine to install dependency for it, or just copy paste it (but the type is a little bit bulky). As this type unfortunately has a lot of weird edge cases 😅 Lmk if you'd prefer to avoid the dependency!

[kevin-dp]

Since we're only using 1 type from it, first reaction would be to vendor it in. But, it's a type so we could make it a dev dependency in which case i'm less worried about the additional dependency (cc @samwillis).

[pawelblaszczyk5]

Tbh I'm not sure about npm packaging and was wondering whether I should put this in dependencies or devDependencies. On one hand it's type only, but on the other hand it'll be part of generated d.ts files and user will need it to work correctly? 🤔

[kevin-dp]

@pawelblaszczyk5 Indeed, i might be wrong here. It may need to be a regular dependency because the type is needed by the users of our library. In that case, i think it's best to vendor in that one type.

[samwillis]

Yep, I would prefer to vendor a minimal type helper for this rather than have a dependancy. We are aiming for almost no dependancies (we only depend on standard schema at the moment).

[pawelblaszczyk5]

I’ll change that then, thanks :)

[changeset-bot]

🦋 Changeset detected

Latest commit: c356557

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 8 packages

Name	Type
@tanstack/db	Patch
@tanstack/electric-db-collection	Patch
@tanstack/query-db-collection	Patch
@tanstack/react-db	Patch
@tanstack/solid-db	Patch
@tanstack/svelte-db	Patch
@tanstack/trailbase-db-collection	Patch
@tanstack/vue-db	Patch

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[pawelblaszczyk5]

I changed it - venodred the type from type-fest

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commit: c356557