feat: Add auto-installaion for Zig's zls (#4339) #142

Job	Run time
test (ubuntu-latest, 27.2, false)	1m 58s
test (ubuntu-latest, 28.2, false)	2m 25s
test (ubuntu-latest, 29.2, false)	2m 12s
test (macos-latest, 27.2, false)	3m 7s
test (macos-latest, 28.2, false)	4m 14s
test (macos-latest, 29.2, false)	3m 38s
test (windows-latest, 27.2, false)	2m 38s
test (windows-latest, 28.2, false)	3m 28s
test (windows-latest, 29.2, false)	2m 54s
test (ubuntu-latest, snapshot, true)	1m 19s
test (macos-latest, snapshot, true)	3m 1s
test (windows-latest, snapshot, true)	41s
	31m 35s

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