[tmva][sofie] Profiler code generation for SOFIE

[olia110]

This Pull request:

This PR introduces a time-based profiler for the SOFIE inference engine. It provides developers with the tools to analyze the performance of generated C++ models by measuring the execution time of each individual operator, as well as the total inference time.

Changes or fixes:

• A new option, SOFIE::Options::kProfile, is added to the RModel::Generate() method to enable the feature.
• When enabled, a new RModelProfiler helper class instruments the generated doInfer() method with std::chrono timers.
• Utility functions like PrintProfilingResults() and GetOpAvgTime() are added to the generated Session struct to access the collected timing data.

Checklist:

• Tested changes locally by running inference in a loop and verifying the timing results.
• updated the docs (if necessary)