add NSIS support #2768

Job	Run time
License checks	1m 22s
Extract crate metadata	7s
Ensure 'cargo fmt' has been run	4s
Run tests with system wide configuration	3m 31s
Run tests with updated syntaxes and themes	8m 29s
Documentation	58s
cargo audit	1m 43s
Minimum supported rust version	4m 33s
aarch64-unknown-linux-gnu (ubuntu-20.04)	5m 18s
arm-unknown-linux-gnueabihf (ubuntu-20.04)	7m 47s
arm-unknown-linux-musleabihf (ubuntu-20.04)	5m 25s
i686-pc-windows-msvc (windows-2019)	10m 22s
i686-unknown-linux-gnu (ubuntu-20.04)	6m 22s
i686-unknown-linux-musl (ubuntu-20.04)	5m 2s
x86_64-apple-darwin (macos-12)	7m 19s
x86_64-pc-windows-gnu (windows-2019)	11m 13s
x86_64-pc-windows-msvc (windows-2019)	10m 38s
x86_64-unknown-linux-gnu (ubuntu-20.04)	5m 5s
x86_64-unknown-linux-musl (ubuntu-20.04)	7m 23s
	1h 42m 41s

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