Attach compiled `cot-cli` binary to releases

[seqre]

Problem statement

Users wanting to try Cot have to compile the cot-cli binary themselves which adds a small friction to the process which is not necessary.

Proposed solution

We should compile cot-cli for major platforms (Windows, Linux, MacOS) for x86/ARM and attach those to the releases. This should also allow tools like cargo binstall to install it right away.

Alternatives considered

No response

Drawbacks

No response

Additional context

No response