Add reverse_qubit_order to QasmModule

[TheGupta2012]

Fixes #56

Summary of changes

Documentation updates:

• docs/index.rst: Updated the example to use the pyqasm.load method instead of pyqasm.unroll and adjusted the variable names accordingly.
• examples/unroll_example.py: Updated the script description to reflect the use of pyqasm instead of pyqasm.unroll.
• examples/validate_example.py: Updated the script description to reflect the use of pyqasm instead of pyqasm.validate.

Code enhancements:

• pyqasm/analyzer.py: Added the get_op_bit_list method to retrieve the list of qubits associated with an operation. [1] [2]
• pyqasm/modules.py: Refactored the _remap_qubits method to use the new Qasm3Analyzer.get_op_bit_list method and implemented the reverse_qubit_order method to support in-place reversal and return a new module if requested. [1] [2] [3]

Testing:

• tests/qasm3/test_transformations.py: Added a new test function test_reverse_qubit_order_qasm3 to verify the functionality of the reverse_qubit_order method.

[codecov-commenter]

Codecov Report

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