remove dependency with sd-jwt-python

[peppelinux]

@Zicchio has introduced the support of sd-jwt within this SDK, here:
https://github.com/italia/eudi-wallet-it-python/pull/277/files#diff-c2260eb7da4a0da1686cdfce91f958dd87d554fffd35df96f0c79aaebef2bc02

in the form used by @Zicchio he deligns the removal of sd-jwt-python as project dependency.

@PascalDR I need you to individuate all the parts that still uses sd-jwt-python, their intended usage and I ask you to extend the current approach of @Zicchio 's sd_jwt.py including all the uncovered feature we might need, before the removal of sd-jwt as package.