fix: update `WorkspacesEmpty.tsx` from material ui to tailwind #35085

Job	Run time
changes	12s
changes	12s
gen	4m 33s
gen	4m 33s
chromatic	2m 5s
chromatic	2m 0s
fmt	43s
fmt	43s
lint	2m 2s
lint	2m 2s
build-dylib	0s
build-dylib	0s
offlinedocs	0s
offlinedocs	0s
sqlc-vet	0s
sqlc-vet	0s
test-cli	0s
test-cli	0s
${{ matrix.variant.name }}	0s
${{ matrix.variant.name }}	0s
test-go	0s
test-go	0s
test-go-pg	0s
test-go-pg	0s
test-go-pg-16	0s
test-go-pg-16	0s
test-go-race	0s
test-go-race	0s
test-go-race-pg	0s
test-go-race-pg	0s
test-go-tailnet-integration	0s
test-go-tailnet-integration	0s
test-js	56s
test-js	56s
build	0s
build	0s
< 8451 span class="position-relative lh-0"> deploy	0s
deploy	0s
deploy-wsproxies	0s
deploy-wsproxies	0s
required	7s
required	7s
notify-slack-on-failure	0s
notify-slack-on-failure	0s
	21m 11s

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