…or CI (#115)

* CMake: Bumps the minimum CMake version to 3.13
* CMake: Add BUILD_SHARED_LIBS matrix for ON and OFF using similar config for macos-latest, windows-latest, and ubuntu-latest
* CMake: Modernize CMake configuration to prevent flag/feature leaking
* CMake: Adds CPack configuration so `package_source` target is available for dist generation
* CMake: Updates FindPROJ.cmake with GDAL's recent version
* CMake: add BUILD_MAN and BUILD_DOC options
* CMake: Windows PDB install with BUILD_SHARED_LIBS
* CMake: Remove FindGeoTIFF.cmake
* Removes 16 year old dead `makefile.mpw`
* Removes 6 year old dead `makefile.vc`
* CI: Generates release artifacts and attaches them to every build
* CI: Creates a release and attaches release artifacts for every tag of the OSGeo/libgeotiff repository
* CI: [Attests](https://github.com/actions/attest-build-provenance) the release artifacts if the `github.repository_owner == OSGeo`
* CI: Remove Appveyor config

Contrary to what the documentation of GTIFDefn::ProjParm[] mentionned,
we failed to normalize angular measures to degrees when reading them
from projection parameters (ProjXXXXXGeoKey's) when ProjCoordTransGeoKey
was present (but we did normalize them when reading them from the PROJ
database when there were was only a EPSG PCS code)

Relates to OSGeo/gdal#10154 and OSGeo/gdal#10158

GTIFGetDefn(): add missing normalization of angular units to degree

.travis.yml: remove OSX

…TCH_VERSION, LIBGEOTIFF_REV_VERSION, and LIBGEOTIFF_STRING_VERSION variables in geotiff.h, and autogenerate it

Fix #119

 Add LIBGEOTIFF_MAJOR_VERSION, LIBGEOTIFF_MINOR_VERSION, LIBGEOTIFF_PATCH_VERSION, LIBGEOTIFF_REV_VERSION, and LIBGEOTIFF_STRING_VERSION variables in geotiff.h, and autogenerate it

…ID 1589229)

https://gcc.gnu.org/gcc-15/porting_to.html#c23-fn-decls-without-parameters

Fix FTBFS with GCC 15.