feat(backtracking): add m-coloring algorithm with type hints and doctests · TheAlgorithms/Python@ecab4cf

backtracking/m_coloring_problem.py:36:32: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:36:27: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:16:66: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:16:61: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:16:27: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:4:89: E501 Line too long (91 > 88)

backtracking/m_coloring_problem.py:4:73: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:4:48: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:4:43: UP006 Use `list` instead of `List` for type annotation

backtracking/m_coloring_problem.py:1:1: UP035 `typing.List` is deprecated, use `list` instead

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