CICD

Add installation guide to VS Code Extension readme #1410

Job	Run time
WASM version	2m 11s
Extract crate metadata	3s
Ensure 'cargo fmt' has been run	18s
Documentation checks	6m 12s
aarch64-unknown-linux-gnu (ubuntu-20.04)	3m 44s
Minimum supported rust version	2m 5s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	4m 14s
arm-unknown-linux-musleabihf (ubuntu-20.04)	4m 2s
i686-pc-windows-msvc (windows-2019)	7m 22s
i686-unknown-linux-gnu (ubuntu-20.04)	3m 43s
i686-unknown-linux-musl (ubuntu-20.04)	3m 54s
x86_64-apple-darwin (macos-12)	6m 39s
x86_64-pc-windows-msvc (windows-2019)	6m 41s
x86_64-unknown-linux-gnu (ubuntu-20.04)	3m 52s
x86_64-unknown-linux-musl (ubuntu-20.04)	3m 57s
	58m 57s

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