Move code highlighting from client to server

[saadq]

As you can see in the below images from Chrome's performance tab, there is a small delay between when the page has loaded and when the code gets highlighted.

It would be preferable if the highlighting could be done on the server so that the code will already be highlighted by the time it renders.

At the moment, the highlighting is being done here:

proposals.es/src/components/proposals/Readme.tsx

Lines 27 to 31 in 6123468

	useMount(() => {
	import('highlight.js').then((hljs) => {
	hljs.default.highlightAll()
	})
	})

Ideally, it should be moved to somewhere here:

proposals.es/src/pages/proposals/[proposalTitle].tsx

Lines 48 to 50 in 6123468

	const baseUrl = getReadmeBaseUrl(proposal)
	const readmeMarkdown = await getReadmeForProposal(proposal)
	const readmeHtml = marked(readmeMarkdown, { baseUrl })

Not highlighted	Highlighted