Plan to improve the profiler

[yungyuc]

It has been discussed that modmesh can use enhancements to the current prototype of the profiling systems.

Some working items are identified:

1. We should start with integrating the profiling of Python and C++. If possible, we can try to merge the call stacks from both Python and C++ in the profiling entries.
2. To assist the development, we will visualize the profile results held in the data structures in memory.
3. Develop serialization (and deserialization) of the profiling data structures. It allows preserving the results for future inspection (visualization in UI), and sharing among contributors.

These ideas are contributed by @tigercosmos @q40603 @kuomc and others. An older discussion can be found at #135 . We will need more discussions and prototypes to move it forward.