feat(nsis): add an option to disable compression

[Legend-Master]

No description provided.

[amrbashir]

I am not sure what this PR is trying to solve, it is more or less looks like a refactor to me.

[Legend-Master]

Before

After

[amrbashir]

That still not an issue, if user specifies null we default back to lzma, or maybe we need to actually make null disable compression

[Legend-Master]

Isn't this about correcting the schema?

[amrbashir]

You're right, but I think the schema is kinda correct, maybe just missing a documentation to explain that using null will default to lzma.

This PR has a breaking change because it changed the field from Option<T> to T and I am afraid some users may want to be able to disable compression and if that were to be requested, we will have to make another breaking change, so maybe we should take the opportunity to cover that case as well?

[Legend-Master]

Right, we can include no compression as an option here

[amrbashir]

Thank you