fix: remove SDK files and update dependencies

[gentlementlegen]

Deleted src/sdk directory, adjusted dependencies, and updated relevant imports. The new SDK is located at https://github.com/ubiquity-os/plugin-sdk

Resolves #192

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@whilefoo I wonder if it makes sense to move the signature within the SDK as well. The problem now is that the signature gets created inside the kernel and decoded within the SDK which is prone to error. Related PR: ubiquity-os/plugin-sdk#22

[whilefoo]

@whilefoo I wonder if it makes sense to move the signature within the SDK as well. The problem now is that the signature gets created inside the kernel and decoded within the SDK which is prone to error. Related PR: ubiquity-os/plugin-sdk#22

I'm not sure what you mean by that. Do you mean to move signature creation/verification functions inside the SDK and import them from SDK in the kernel?

[gentlementlegen]

@whilefoo Yes exactly, this way the encode / decode happens in the same package which seems to make more sense to me.

[whilefoo]

Yeah it makes sense because when you modify encode, you also need to modify decode so if it was separate you would need to update both packages

[gentlementlegen]

Yeah it makes sense because when you modify encode, you also need to modify decode so if it was separate you would need to update both packages

Indeed. Then I will move the encode logic as well and include the package here.

[gentlementlegen]

@whilefoo moved this in a signature import within the SDK: https://github.com/ubiquity-os/ubiquity-os-kernel/pull/193/files#diff-9d1e92d5ff6f0b749097b71ca93f176a78310fe4c8da4d615811d4c128df2050R7