Issue #781

[Adewale-1]

Added

• Added a new file smc.py in the pandas_ta/momentum folder for the Smart Money Indicator (SMI).
• Included smc in the pandas_ta/__init__.py for module-level access.
• Added def smc(self, fast=None, slow=None, signal=None, scalar=None, offset=None, **kwargs): to pandas_ta/core.py for core functionality of the SMI/ SMC indicator.
• Created tests for the SMI indicator in tests/test_ext_indicator_momentum.py.
• Created tests for the SMI indicator in tests/test_indicator_momentum.py.

Fixed

• Ensured all tests pass after adding the new indicator and its corresponding tests.