Add cmake config to export and install

[AddressXception]

Add support for consuming the build as part of other intermediate targets.

[cla-bot[bot]]

We require contributors to sign our Contributor License Agreement https://github.com/cryspen/hacl/blob/main/CLA.md ensuring that the contribution can be licensed under Apache 2.0 and MIT. In order for us to review and merge your code, please mention @cryspen/core in a comment below to get yourself added.

[AddressXception]

CLA @cryspen/core

[cla-bot[bot]]

We require contributors to sign our Contributor License Agreement https://github.com/cryspen/hacl/blob/main/CLA.md ensuring that the contribution can be licensed under Apache 2.0 and MIT. In order for us to review and merge your code, please mention @cryspen/core in a comment below to get yourself added.

[cla-bot[bot]]

We require contributors to sign our Contributor License Agreement https://github.com/cryspen/hacl/blob/main/CLA.md ensuring that the contribution can be licensed under Apache 2.0 and MIT. In order for us to review and merge your code, please mention @cryspen/core in a comment below to get yourself added.

[franziskuskiefer]

Thanks for the contribution! I'm not sure why the bot is acting up. I updated the CLA. @duesee can you have a look at this? Otherwise this looks good to me.

[coveralls]

Pull Request Test Coverage Report for Build 3853741411

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 53.588%

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Totals
Change from base Build 3853740392:	0.0%
Covered Lines:	30653
Relevant Lines:	57201

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💛 - Coveralls

[cla-bot[bot]]

We require contributors to sign our Contributor License Agreement https://github.com/cryspen/hacl/blob/main/CLA.md ensuring that the contribution can be licensed under Apache 2.0 and MIT. In order for us to review and merge your code, please mention @cryspen/core in a comment below to get yourself added.