* Add combined on-CPU and off-CPU profiler script
- Implemented a new profiling tool that captures both on-CPU and off-CPU activity for a specified process.
- The script runs 'oncputime' and 'offcputime' tools simultaneously and combines their results into a unified flamegraph.
- Added functionality to discover threads and profile them individually if the application is multi-threaded.
- Included error handling for tool execution and output processing.
- Created methods for generating flamegraph data and SVG visualizations.
- Added command-line argument parsing for user-defined profiling parameters.
- Implemented detailed analysis reports for both individual threads and overall profiling results.
* feat: integrate blazesym v0.2.0 for improved symbol resolution and add test program for memory leak detection
* docs: update README to enhance wall clock profiling tutorial with detailed explanations and examples
* feat: add wallclock-profiler tests to CI workflow for tool validation
* fix: rename combined_profiler.py to wallclock_profiler.py in test scripts and usage examples
