Created Mesh2d creator Python script

[Stephen-Armstrong]

Thank you for your contribution to rustBCA!

Before submitting this PR, please make sure you have:

• 71 Opened an issue

• [x] Referenced the relevant issue number(s) below
• [x] Provided a description of the changes below
• [x] Ensured all tests pass and added any necessary tests for new code

Fixes # (issue)

Description

Please include a concise description of the change and how it addresses a relevant issue, including references, input files, and figures as relevant.

There is an added Python script called create_mesh2D.py. The script allows with simple commands to create a mesh2D object that contains all of the information required to print to a RustBCA input file and to put the information save the information in the .toml format of RustBCA. Includes functions to create N-gons, rectangles, and triangles.

Tests

Please describe how the changes in this pull request have been tested, including system information such as OS. Windows 10. Replicated the boron nitride example with a similar number of triangles.

[drobnyjt]

@Stephen-Armstrong I'm ready to close this and add the script if you think it's good to go

[Stephen-Armstrong]

I think it's good to go!