[Shared] .deserialize should throw on an invalid input, rather than returning undefined

[JayPanoz]

From @tefkah in Discord

i find it very tricky to figure out why Manifest.deserialize is not deserializing my input correctly. if it were to throw in place of return;, i could at least figure out where its going wrong (still a bit tricky with the minified code, but much easier!)
currently what i end up doing is just pulling down the ts-toolkit and stepping through parsing it w a debugger, which feels more involved than needed
but its def possible i may be missing some obvious way to accomplish all of the above here!
heres a repro for 2: https://codesandbox.io/p/github/tefkah/readium-parse-repro/main (apparently codesandbox is shutting down on in mid june,otherwise just look here: https://github.com/tefkah/readium-parse-repro)

I agree this is quite an issue because we do not like to waste time on debugging things a contextualised error would easily clarify. I personally find this a shortcoming that warrants a breaking change if it makes developers’ life easier