Updates to readme and demos #70

Job	Run time
WASM Sandbox (ubuntu-latest)	4m 43s
JS Sandbox (windows-latest)	17m 18s
Python wheelhouse build (Windows)	8m 43s
Rust (ubuntu-latest)	2m 57s
JS Sandbox (ubuntu-latest)	7m 48s
Python wheelhouse build (Linux)	6m 9s
Rust (windows-latest)	1m 52s
WASM Sandbox (windows-latest)	5m 54s
Nanvix Sandbox · build	1m 49s
Python wheelhouse test (ubuntu-latest)	1m 28s
Python wheelhouse test (windows-latest)	3m 0s
	1h 1m 41s

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