feat: implement and perform benchmarking

[currantw]

Summary

Cleanup and get existing C# benchmarking infrastructure working. Align with other Valkey GLIDE clients.

Description of the Status Quo

The C# client currently has a custom benchmarking implementation in /benchmarks/csharp_benchmark.csproj that uses a custom CLI application (Program.cs) with manual timing and statistics to compare Valkey GLIDE against StackExchange.Redis. Results are outputs JSON files in a format that integrates with the shared valkey-glide/benchmarks/install_and_test.sh script.

Steps to Reproduce

Current benchmarking workflow:
Run via Task: task benchmark FRAMEWORK=net8.0

Proposed Solution

1. Verify and fix current implementation.
2. Ensure alignment with other Valkey GLIDE clients.
3. Code quality and maintainability improvements.
4. Update documentation (DEVELOPER.md).

Effort & Complexity Estimates

	Estimate	Explanation
Effort	Small	Existing infrastructure and other clients to model off.
Complexity	Low	Limited scope, simple implementation.

Related Issues

⚪ None

[currantw]

On pause pending further clarity on benchmarking approach across all Valkey GLIDE clients.