Add Python extension API handlers and router system

[reiase]

• Implemented a new module for Python extension API handlers in python/probing/handlers/pythonext.py.
• Created a router system for handling API requests in python/probing/handlers/router.py.
• Added an __init__.py file to the handlers package for better organization and automatic handler registration.
• Developed unit tests for the new handlers and router functionality in tests/handlers/test_python_handlers.py.
• Handlers include functionality for Ray timeline, Chrome tracing, and PyTorch profiling.

[codecov]

Codecov Report

❌ Patch coverage is 54.35140% with 278 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
python/probing/handlers/pythonext.py	13.87%	180 Missing ⚠️
probing/extensions/python/src/extensions/python.rs	41.22%	67 Missing ⚠️
python/probing/handlers/router.py	86.40%	17 Missing ⚠️
tests/handlers/test_python_handlers.py	88.99%	12 Missing ⚠️
tests/core/test_init.py	87.50%	2 Missing ⚠️

Files with missing lines	Coverage Δ
...ng/extensions/python/src/extensions/python/tbls.rs	50.23% <100.00%> (ø)
python/probing/handlers/__init__.py	100.00% <100.00%> (ø)
tests/ext/test_tracing_span.py	100.00% <ø> (ø)
tests/inspect/test_trace_helpers.py	98.03% <ø> (ø)
tests/core/test_init.py	89.60% <87.50%> (ø)
tests/handlers/test_python_handlers.py	88.99% <88.99%> (ø)
python/probing/handlers/router.py	86.40% <86.40%> (ø)
probing/extensions/python/src/extensions/python.rs	28.73% <41.22%> (ø)
python/probing/handlers/pythonext.py	13.87% <13.87%> (ø)

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