Update to zwasm v0.1.0, docs overhaul #35

Job	Run time
cross-compile (aarch64-linux-gnu)	3m 19s
test-linux	3m 18s
cross-compile (aarch64-macos-none)	3m 21s
cross-compile (x86_64-linux-gnu)	3m 6s
cross-compile (x86_64-macos-none)	3m 6s
test-macos	2m 26s
	18m 36s

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