Updated dependent libraries

Merge pull request #17 from connectivecpp/develop

Updating dependent library versions

Updating to latest Catch2 version, macos-15 on runner

Updating Catch2 version, macos-15, added a "do nothing" C++ file at top level to correct the GitHub Languages percentage.

Updated Catch version

Merge pull request #14 from connectivecpp/develop

Merge develop to main

Full example code along with workflow for doc generation

Minor tweaks have been made to the README files and workflows.