feat: Create main.py with simple cli

[Smirl]

Summary

Created main.py with a simple CLI using argparse. It has three subcommands:

• info — lists available tools and proto file paths
• grpc <host> — prints an evans command for gRPC debugging
• http <url> — prints a hey command for HTTP load testing

Example usage:

python main.py info
python main.py grpc localhost:50051
python main.py http http://my-service/healthz -n 200 -c 20

Let me know if you'd like it to actually execute the commands, add more subcommands, or change the structure.

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Task ID: 24bfcb29-b371-472b-822a-341266fef5fd
Run ID: 65be66a3-6a03-4cbd-9830-1d48f0d546c4