Opencamlib

- Changes FindPython to FindPython3
- Disables BUILD_DOC when building the Python library
- Fixes issue with VERSION_STRING, it could not be passed as a CMake option, because the default was set to a boolean value, which could not be changed to a string.
- Adds LANGUAGES to CMake's project() definition
- Use sscanf on unix platforms in STLReader
- Use RelWithDebInfo for release builds, and add .dSYM file on macOS for source mapping and better debugging support.
- Enable link time optimization
- Zip CXX libraries before release
- Add custom delocate script on macOS, and prefer system OpenMP before loading the bundled one.
- Use current date as version in development builds

This release fixes an issue with the pre-compiled C++ libraries not being uploaded to Github releases.

It also fixes an issue with the OpenCAMLib Python module for Python v3.11, which was fixed in the upstream boost-python-precompiled repository (https://github.com/vespakoen/boost-python-precompiled/commit/0c9b9e6091118875049b0d85d20cde563f354418)

December 2022 release of OpenCAMLib.

**!! BREAKING CHANGE !!**

The way to import the Python module changed!
Change your imports from:
python
old
import ocl

to
python
new
from opencamlib import ocl


Alternatively, to support old and new versions of OpenCAMLib:

python
try:
from opencamlib import ocl
except ImportError:
try:
import ocl
except ImportError:
pass
pass


We had to change this because we publish pre-compiled Python wheels now, and the `ocl` name was already taken.

The most notable changes are:

- We now provide pre-compiled Python wheels and native Node.js modules for the most common platforms.
- We added a OpenCAMLibConfig.cmake file, making it easier to find and link to OpenCAMLib when your project uses CMake.
- Dropped Python 2 support.
- Added pyproject.toml / setup.py scripts, and `scikit-build-core`, to allow a more simple `pip install .` when compiling from source.
- The CMake configuration got a lot of attention and got simplified, which hopefully will make it easier for packagers to configure.
- A lot of the examples got fixed and some very old ones got removed.
- An `install.sh` script got added to aid in compiling OpenCAMLib from source.
- Removed / updated use of deprecated functions, fixed most compiler warnings
- Fixed a bug in the Waterline operation's destructor, which caused it to segfault in some situations.

For a diff of all the changes, see (warning, large!):

https://github.com/aewallin/opencamlib/compare/2019.07..2022.12.17

July 2019 release of opencamlib.

The first release under LGPL license.

This tag marks the last version of opencamlib under GPL license.
A change to LGPL will follow.