upgrade: cursor package upgrade for Solid 2.0

[davedbase]

Solid 2.0 migration

• createEffect updated to the split compute/apply model — cleanup is returned from apply instead of onCleanup
• isServer import moved from solid-js/web → @solidjs/web
• Tests updated with flush() after createRoot and each signal write, since Solid 2.0 defers effects by default
• Peer deps bumped to solid-js@^2.0.0-beta.10 + @solidjs/web@^2.0.0-beta.10

New primitives

• makeBodyCursor(cursor) / makeElementCursor(target, cursor) — imperative, non-reactive; call anywhere, get a cleanup function back. makeBodyCursor delegates to makeElementCursor(document.body, cursor) to avoid duplication
• createDragCursor(target, options?) — sets "grab" on the element and switches to "grabbing" on the body during drag. The body-targeting trick is necessary because element inline styles beat body inline styles even with !important, so the element cursor is cleared during drag to let the body cursor inherit through
• cursorRef(cursor) — ref factory for <div ref={cursorRef("pointer")}>, accepts a static value or signal

[changeset-bot]

🦋 Changeset detected

Latest commit: 8cfd3f8

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

This PR includes changesets to release 1 package

Name	Type
@solid-primitives/cursor	Major

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR