feat: replace OnLayoutEvent with SvgOnLayoutEvent

[kacperzolkiewski]

Summary

This PR creates SvgOnLayoutEvent and replaces usage of OnLayoutEvent for Android because React Native Android team will remove this event from their codebase in near future.

Test Plan

Verified that the onLayout event emitted by Svg produces the same payload before and after this change.
Steps:

1. Added console.log inside Svg’s onLayout handler.
2. Logged event payload before the change.
3. Applied change to use SvgOnLayoutEvent.
4. Logged event payload after the change.

Result:
Event payload structure and values remained identical

Compatibility

OS	Implemented
Android	✅
iOS	✅
MacOS	✅

Checklist

• I have tested this on a simulator

[cortinico]

We'd love to see it merged as OnLayoutEvent is legacy arch and we're going to remove it soon-ish:

• RFC0929: Removal of the Legacy Architecture of React Native react-native-community/discussions-and-proposals#929

[piaskowyk]

The rest of PR looks ok!

[piaskowyk]

Are you sure it should be Int instead of Float?

[kacperzolkiewski]

During implementation I was looking at official RN code: https://github.com/facebook/react-native/blob/main/packages/react-native/ReactAndroid/src/main/java/com/facebook/react/uimanager/OnLayoutEvent.kt

And there they have ints

[kacperzolkiewski]

Also when we look at the creation of SVGOnLayoutEvent inside VirtualView we pass to this event Ints:
https://github.com/software-mansion/react-native-svg/pull/2738/files#diff-b99e5fc93019444c57df66f6135a6ff9c28d881abe126fc0adb12773b24a7193R608

[jakex7]

LGTM

[WoLewicki]

LGTM! Please make sure that it works on both archs and platforms and I think we are good with merging it.