CICD

Add installation guide to VS Code Extension readme #1457

Job	Run time
Documentation checks	6m 31s
Extract crate metadata	3s
Package vscode extension	9s
Ensure 'cargo fmt' has been run	12s
WASM version	2m 19s
Minimum supported rust version	1m 59s
aarch64-unknown-linux-gnu (ubuntu-20.04)	3m 49s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	4m 29s
arm-unknown-linux-musleabihf (ubuntu-20.04)	4m 5s
i686-pc-windows-msvc (windows-2019)	6m 39s
i686-unknown-linux-gnu (ubuntu-20.04)	3m 50s
i686-unknown-linux-musl (ubuntu-20.04)	4m 3s
x86_64-apple-darwin (macos-13)	4m 8s
aarch64-apple-darwin (macos-15)	2m 17s
x86_64-pc-windows-msvc (windows-2019)	5m 29s
x86_64-unknown-linux-gnu (ubuntu-20.04)	3m 28s
x86_64-unknown-linux-musl (ubuntu-20.04)	4m 2s
	57m 32s

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