* Move the functionality to issue credentials from the credential binary and connect it with nym-cli
* finished CLI part, trying to fit SDK part
* finished Rust SDK
* fix: cleanup
* linting
* linting
* linting
* remove one layer of coconut in nym-cli
* linting
* Fixes based on PR comments
* formatting
* fixes based on PR comments
* formatting
* fixing clippy errors
* fixed post-rebasing issues and converted the lib into shared dep for other binaries
* removed credentials client in favour of moving the functionality to nym-cli
* removed redundant 'issue_credential' example (it did the same thing as 'bandwdith')
* removed credentials client from build server
* made the coconut cli also accept nym-api configs
* fixed support for socks5 and NR
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Co-authored-by: Jędrzej Stuczyński <jedrzej.stuczynski@gmail.com>