feat(core): validate subject for illegal whitespace characters #1033

Job	Run time
test-node / node-tests-workspace (2.4.x, 24.x)	43s
test-unsafe / test-unsafe (2.4.x)	21s
lint / install (2.4.x, core)	10s
lint / install (2.4.x, jetstream)	10s
lint / install (2.4.x, kv)	12s
lint / install (2.4.x, services)	9s
lint / install (2.4.x, obj)	12s
lint / install (2.4.x, transport-deno)	9s
test-deno / install (2.4.x, core)	1m 41s
test-deno / install (2.4.x, obj)	34s
test-deno / install (2.4.x, kv)	1m 2s
test-deno / install (2.4.x, jetstream)	2m 10s
lint / install (2.4.x, transport-node)	12s
test-deno / install (2.4.x, transport-deno)	17s
test-deno / install (2.4.x, services)	32s
coveralls-finish	4s
	8m 38s

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