Add ConicalFrustum composite surface

[paulromano]

Description

This PR implements a new ConicalFrustum surface that allows a user to define a conical frustum, otherwise known as a truncated cone (equivalent to the TRC macrobody in MCNP).

Checklist

• I have performed a self-review of my own code
• I have run clang-format (version 15) on any C++ source files (if applicable)
• I have followed the style guidelines for Python source files (if applicable)
• I have made corresponding changes to the documentation (if applicable)
• I have added tests that prove my fix is effective or that my feature works (if applicable)

[eepeterson]

nice feature and clean implementation - just a couple small edits.