feat: add workspace_required to nil_ls and nixd #37

Job	Run time
check (aarch64-linux, ubuntu-24.04-arm)	37s
check (x86_64-linux, ubuntu-24.04)	28s
switch (x86_64-linux, ubuntu-24.04)	1m 39s
switch (aarch64-linux, ubuntu-24.04-arm)	1m 34s
	4m 18s

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