feat: switch agent fetching to the server side

this brings the benefit of fitting in the revalidator lifecycle we have
created via the useLiveData hook.

app/utils/use-agent.tsx

@@ -1,24 +0,0 @@
-import { useEffect, useMemo, useRef } from 'react';
-import { useFetcher } from 'react-router';
-import { HostInfo } from '~/types';
-
-export default function useAgent(nodeIds: string[]) {
-	const fetcher = useFetcher<Record<string, HostInfo>>();
-	const qp = useMemo(
-		() => new URLSearchParams({ node_ids: nodeIds.join(',') }),
-		[nodeIds],
-	);
-
-	const idRef = useRef<string[]>([]);
-	useEffect(() => {
-		if (idRef.current.join(',') !== nodeIds.join(',')) {
-			fetcher.load(`/api/agent?${qp.toString()}`);
-			idRef.current = nodeIds;
-		}
-	}, [qp.toString()]);
-
-	return {
-		data: fetcher.data,
-		isLoading: fetcher.state === 'loading',
-	};
-}