chore(signals-react): throw error when auto-tracking with React 19

[JoviDeCroock]

Resolves #576

This should point people in the right direction 😅

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🦋 Changeset detected

Latest commit: 4c4c507

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@preact/signals-react	Patch

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[github-actions]

Size Change: 0 B

Total Size: 80.5 kB

ℹ️ View Unchanged

Filename	Size
docs/dist/assets/client.********.js	46.3 kB
docs/dist/assets/index.********.js	838 B
docs/dist/assets/jsxRuntime.module.********.js	284 B
docs/dist/assets/preact.module.********.js	4.03 kB
docs/dist/assets/signals-core.module.********.js	1.4 kB
docs/dist/assets/signals.module.********.js	2.02 kB
docs/dist/assets/style.********.js	21 B
docs/dist/assets/style.********.css	1.21 kB
docs/dist/basic-********.js	244 B
docs/dist/demos-********.js	3.41 kB
docs/dist/nesting-********.js	1.13 kB
docs/dist/react-********.js	242 B
packages/core/dist/signals-core.js	1.45 kB
packages/core/dist/signals-core.mjs	1.47 kB
packages/preact/dist/signals.js	1.27 kB
packages/preact/dist/signals.mjs	1.22 kB
packages/react-transform/dist/signals-*********.js	4.74 kB
packages/react-transform/dist/signals-transform.mjs	4 kB
packages/react-transform/dist/signals-transform.umd.js	4.86 kB
packages/react/dist/signals.js	188 B
packages/react/dist/signals.mjs	150 B

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[rschristian]

Is the peer dependency warning not enough? I sorta figure that should be enough, but I guess this can't hurt