Feature description

I would like to suggest adding functions for the Hamiltonian in both classical mechanics and quantum mechanics
to thephysics directory.

Proposed functions

1. Classical Hamiltonian
   Computes H = T + V for a particle or system, where T is kinetic energy and V is potential energy.
   Example use case: free particle, harmonic oscillator, simple pendulum.

2. Quantum Hamiltonian (1D)
   Constructs the Hamiltonian matrix for a particle in a 1D potential using finite difference discretization.
   Example use case: solving the time-independent Schrödinger equation.

Benefits

Provides a practical way for learners to understand and simulate physical systems in Python.
Fits the existing educational purpose of thephysics directory as a collection of algorithmic implementations.