[PoC] Add ZkAuth precompile to Moonbase

[Agusrodri]

What does it do?

Adds a PoC for the ZkAuth verification precompile.

This precompile, allows to verify a Risc0 zk-proof receipt by calling the verifyProof function, passing an encoded (ideally a Groth16-like) receipt as a parameter. If the verification succeeds, the receipt is then returned with the same format as it was originally received in the function parameter.

[github-actions]

Coverage Report

@@                    Coverage Diff                    @@
##           master   zkAuth-precompile-poc      +/-   ##
=========================================================
+ Coverage   80.96%                  81.01%   +0.05%     
+ Files         282                     286       +4     
+ Lines       81614                   81783     +169     
=========================================================
+ Hits        66071                   66251     +180     
- Misses      15543                   15532      -11     

Files Changed	Coverage
/client/rpc/manual-xcm/src/lib.rs	88.00% (-0.46%)	🔽
/pallets/moonbeam-foreign-assets/src/lib.rs	69.67% (+1.49%)	🔼
/runtime/moonbeam/src/lib.rs	47.14% (+0.22%)	🔼
/runtime/moonbeam/src/xcm_config.rs	54.35% (+1.72%)	🔼
/runtime/moonriver/src/lib.rs	47.37% (+0.23%)	🔼
/runtime/moonriver/src/xcm_config.rs	52.17% (+1.64%)	🔼

Coverage generated Mon Aug 19 22:34:49 UTC 2024