PR improves the way of interacting with debug_trace... API endpoints of the Geth node. It provides built-in tracers support (https://geth.ethereum.org/docs/developers/evm-tracing/built-in-tracers) which configs and responses can be deserialised now into the C#'s language structures and more advanced tracing configs (blockOverrides and stateOverrides). Also, corresponding integration tests were added

More specifically, changes introduced by the PR:

1. New DTOs for supporting more sophisticated configs for debug and simulation purposes. BlockOverridesDto and StateOverrideDto (represents Block overrides and State overrides (https://geth.ethereum.org/docs/interacting-with-geth/rpc/objects#block-override-set), TraceCallConfigDto and TraceConfigDto (represents TraceCallConfig and TraceConfig objects https://geth.ethereum.org/docs/interacting-with-geth/rpc/ns-debug#tracecallconfig) and other DTOs for block responses and struct logs. So for example user can specify the block and state overrides for simulation using language structures
2. New SendRequestAsync<TOutput>() method overload with generics for DebugTraceBlock, DebugTraceBlockByHash, DebugTraceBlockByNumber, DebugTraceBlockFromFile, DebugTraceTransaction and DebugTraceCall services. Calling this function will return tracer response deserialised into the specified C# class
3. Adds debug_traceBadBlock endpoint support
4. Adds support for all currently available built-in tracers: opcodeTracer (default), 4byteTracer, callTracer, prestateTracer, noopTracer, bigram, evmdis, opcount, trigram, unigram. Corresponding DTOs for configs and responses for all of them were added. It's also possible to specify a custom code for tracer

Usage example:

Running debug_traceTransaction with callTracer (only top calls, with logs):

var web3Geth = new Web3Geth("http://node:8545");
var result = await web3Geth.GethDebug.TraceTransaction.SendRequestAsync<CallTracerResponse>(
    txHash,
    new TracingCallOptions()
    {
        Timeout = "1m",
        Reexec = 128,
        TracerInfo = new CallTracerInfo(true, true)
    }
);

This will return tracer response deserialised into CallTracerResponse object

More examples you can find in the integration tests