Adds a new airfoil PINN example to /examples/

[peterdsharpe]

Modulus Pull Request

Description

Adds a new airfoil PINN example to /examples. Specific tools and techniques demonstrated in this example include:

• Using Modulus-Sym to define a physics-based learning task for a PINN
• Representing custom geometry and interfacing this with Modulus-Sym, as is often required in engineering applications
• Implementing custom NVIDIA Warp kernels for efficient point sampling of these custom geometries

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The CHANGELOG.md is
  up to date with these changes.

Dependencies

[ktangsali]

/blossom-ci

[ktangsali]

/blossom-ci

[ktangsali]

LGTM! Thanks!