docs: add types to image loader examples

[remcohaszing]

What?

Add type definitions to the image loader file documentation.

Why?

This provides type safety for users.

How?

Use the ImageLoaderProps type to annotate the image loader argument.

[ijjk]

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[graphite-app]

There are two syntax errors in the imageengine loader example:

1. Line 179 has an extra closing parenthesis in the array definition:

   const params = [`w_${width}`, `cmpr_${compression}`)]

   Should be:

   const params = [`w_${width}`, `cmpr_${compression}`]

2. Line 180 has a misplaced backtick in the return statement:

   return `https://example.com${src}?imgeng=/${params.join('/')`

   Should be:

   return `https://example.com${src}?imgeng=/${params.join('/')}`

These syntax errors would prevent the loader from functioning correctly.

Suggested change

	const params = [`w_${width}`, `cmpr_${compression}`)]
	return `https://example.com${src}?imgeng=/${params.join('/')`
	const params = [`w_${width}`, `cmpr_${compression}`]
	return `https://example.com${src}?imgeng=/${params.join('/')}`

Spotted by Graphite Agent



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