Add line breaks to precompiled schemas so that git can merge changes in the output

[Knagis]

Currently the output is a single line which means at every single change in the WebpackOptions.check.js file is a conflict and needs manual rebase.

This PR applies prettier to the minified output, resulting in still mangled code, but split in lines that git should be able to handle.

[Knagis]

@sokra could you please take a look at this? it should reduce how frequently PR rebases are needed in webpack.

[sokra]

For performance reasons this is a minimized file. Adding prettier would increase the file size a lot...

[Knagis]

Tested (this time more likely accurately) - 5.69.0 version size increased from 218KB to 283KB

[Knagis]

sadly terser does not export its output formatting code (which is why i originally went with prettier), so this requires bit of a hack:

	// minimize
	const ast = (
		await terser.minify(code, {
			compress: {
				passes: 3,
			},
			format: {
				ast: true,
				code: false,
			},
			mangle: true,
			ecma: 2015,
			toplevel: true,
		})
	).ast;

	const real_print = ast.print;
	ast.print = (output, ...args) => {
		const real_with_block = output.with_block;
		output.with_block = (...args) => {
			real_with_block.call(output, ...args);
			output.print("\n");
		};
		return real_print.call(ast, output, ...args);
	};
	code = ast.print_to_string({ ecma: 2015 });

With this it is possible to get nice "formatting" with just 6KB increase

my intent was to avoid new dependencies for the package, so only terser and prettier are available.