Fix bound action registration cleanup

[brenelz]

Summary

• preserve a newer bound action registration when an older owner with the same action URL is disposed
• add regression coverage for repeated .with() bindings that share a URL
• add a patch changeset

This fixes forms falling through to native submission at https://action/... after an optimistic update recreates a bound action.

Testing

• pnpm test
• pnpm vitest run test/data/action.spec.ts test/data/events.spec.ts
• pnpm test:types

[changeset-bot]

🦋 Changeset detected

Latest commit: 9abccb5

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

This PR includes changesets to release 1 package

Name	Type
@solidjs/router	Patch

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