Migrate to NuGet Central Package Management

[mus65]

This migrates to Central Package Management . Versions stay the same, so there is no functional difference.

Additional changes I made as part of this:

• replaced some usages of the [1.0.0,) syntax with 1.0.0 since these are equivalent, see docs
• removed the testcontainers -> SSH.NET exclude from IntegrationTests . I can not reproduce this issue anymore. Even if it still woud be a problem, I think it would be better to use VersionOverride here since the version has no meaning anyway.

[Rob-Hague]

Just want to double check the exclude, not sure why there would be no build warnings anymore

[mus65]

I can only reproduce the original warning with Testcontainers <= 3.5.0 which depended on SSH.NET 2020.0.2 . With Testcontainers >= 3.6.0 (which depends on SSH.NET 2023.0.0), the warning disappears.

Still no idea why this makes a difference though.

[Rob-Hague]

Thanks for checking the build warnings. Let's be optimistic that it won't reoccur