[PKG] Initial implementation of Hermite function (v0.0b1)

[MothNik]

This pull request

• ⚙️ sets up the project for installation via pip install (not PyPi yet) with a pyproject.toml with dynamic version and dependencies
• ✍️ adds an initial sketch of a README and examples for what's currently implemented

• 🧑‍💻 implements two core function (without interface for input validation; currently NumPy only) that compute

  • 🧮 the natural logarithm of Hermite polynomials of arbitrary order (with dilation factor)
  • ⚗️ the Hermite functions of arbitrary order (with dilation factor)

  in a numerically stable fashion and with NumPy-style documentation

• ✅❌ pytest-tests that fully cover the previously mentioned functions (also with NumPy-style documentations)
• 📜 a test file generation for a sympy-based test for numerical correctness that would otherwise take forever