Support DomElastica refs on React 18

[Aayush10016]

Fixes #15.

What changed

• Wrapped DomElastica with forwardRef.
• Kept the existing DomElasticaRef imperative API for play() and pause().
• Removed ref from DomElasticaProps so React handles it as a real ref instead of a normal prop.

Why

The package allows React >=18.2, but plain function component ref props only work with React 19 behavior. In React 18, the ref is not delivered to DomElastica as a normal prop, so the imperative play() and pause() handle cannot be used reliably.

Using forwardRef preserves React 18 support without requiring a peer dependency bump.

Validation

• node_modules\.bin\tsc.cmd -p packages\react\tsconfig.json --noEmit
• npm --prefix packages\react run build

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