docs: Remove prop adapters from v4 docs, add migration guide

[MatiPl01]

Summary

This PR removes adapters prop from v4 docs and adds migration guide from 3.x

Example image

Migration guide

[tomekzaw]

How about showing a diff instead?

Suggested change

	#### Before
	Using custom adapter for fill and stroke properties:
	```jsx
	import {
	createAnimatedPropAdapter,
	processColor,
	} from 'react-native-reanimated';
	const adapter = createAnimatedPropAdapter(
	(props) => {
	if (Object.keys(props).includes('fill')) {
	props.fill = { type: 0, payload: processColor(props.fill) };
	}
	if (Object.keys(props).includes('stroke')) {
	props.stroke = { type: 0, payload: processColor(props.stroke) };
	}
	},
	['fill', 'stroke']
	);
	const animatedProps = useAnimatedProps(
	() => ({
	fill: 'yellow',
	stroke: 'rgb(255,0,0)',
	}),
	[],
	adapter
	);
	```
	#### After
	Properties work directly without adapter:
	```jsx
	const animatedProps = useAnimatedProps(() => ({
	fill: 'yellow',
	stroke: 'rgb(255,0,0)',
	}));
	```
	#### Before
	Using custom adapter for fill and stroke properties:
	```diff
	-import {
	- createAnimatedPropAdapter,
	- processColor,
	-} from 'react-native-reanimated';
	-
	-const adapter = createAnimatedPropAdapter(
	- (props) => {
	- if (Object.keys(props).includes('fill')) {
	- props.fill = { type: 0, payload: processColor(props.fill) };
	- }
	- if (Object.keys(props).includes('stroke')) {
	- props.stroke = { type: 0, payload: processColor(props.stroke) };
	- }
	- },
	- ['fill', 'stroke']
	-);
	const animatedProps = useAnimatedProps(
	() => ({
	fill: 'yellow',
	stroke: 'rgb(255,0,0)',
	}),
	- [],
	- adapter
	);

[MatiPl01]

Do we even support diff syntax highlighting and formatting? The following screenshot shows a diff from this page and it is hardly readable:

[MatiPl01]

cc @kacperkapusciak Should we be able to render diffs in docs?

[kacperkapusciak]

i remember diffs worked badly without any syntax highlighting

[tomekzaw]

Oh that's right

[tomekzaw]

TODO: ask @jakex7 what is the first version of RNSVG that doesn't need prop adapters

Suggested change

	In Reanimated 4, the `adapters` parameter has been removed from `useAnimatedProps`. All properties that previously required adapters now should work directly.
	In Reanimated 4, `createAnimatedPropAdapter` function along with `adapters` parameter in `useAnimatedProps` hook have been removed. If some property needs preprocessing, it must be done inside `useAnimatedProps` worklet.
	The most common use case for custom prop adapters was animating `fill` and `stroke` properties of `react-native-svg` components. Note that starting from `[email protected]` these props no longer need preprocessing and can be animated directly just like other color props like `backgroundColor` or `borderColor`.

[jakex7]

I believe that starting with [email protected] + [email protected], we no longer need the adapter to animate fill/stroke properties.