feat(react-transform): Suppport require syntax in our babel transform

[JoviDeCroock]

Noticed we threw an error for non-ESM modules, so added support for that as we are exporting a CJS build of our react-bindings either way.

CC @andrewiggins not sure if you opted out here for a reason

Fixes https://github.com/preactjs/signals/issues/575

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Latest commit: a28dc054a7d2fa615e3f059b1d3617576e969816

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| Name | Type | | ------------------------------- | ----- | | @preact/signals-react-transform | Minor |

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Size Change: +348 B (+0.43%)

Total Size: 81.4 kB

Filename	Size	Change
packages/react-transform/dist/signals-*********.js	5.03 kB	+122 B (+2.49%)
packages/react-transform/dist/signals-transform.mjs	4.27 kB	+103 B (+2.47%)
packages/react-transform/dist/signals-transform.umd.js	5.15 kB	+123 B (+2.45%)

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/dist/signals.js` | 188 B | | `packages/react/dist/signals.mjs` | 150 B |

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[marvinhagemeister]

LGTM, but a test case would be nice

[JoviDeCroock]

@marvinhagemeister good shout, was still figuring out how to trick the isModule helper 😅

[alxrodav]

Any progress with this PR? I started a new React Native App, and would love to give it a try to signals