Add bindings for TableScan struct from datafusion_expr::TableScan #177

Is your feature request related to a problem or challenge? Please describe what you are trying to do.
Python bindings for datafusion_expr::TableScan following the existing patterns already in place so that the resulting struct is called PyTableScan and maintains all the abilities that it has in native Rust.

Describe the solution you'd like
Bindings for PyTableScan as part of a Python expr submodule.

Describe alternatives you've considered
None

Additional context
None