library versions: reporting/consistency

I don't have a strong opinion on what to change for this, but please consider establishing a conistent rich return value for the `*_version()` functions that can be used for printing or transmitting. Sometimes expectations are driven by what terra or sf have, and I keep juggling different aspects of these four functions: ```R gdalraster::gdal_version() [1] "GDAL 3.13.0dev-35c066e12e, released 2026/03/25 (debug build)" "3130000" [3] "20260325" "3.13.0dev-35c066e12e" > gdalraster::gdal_version_num() [1] 3130000 > gdalraster::proj_version() $name [1] "9.7.0" $major [1] 9 $minor [1] 7 $patch [1] 0 > gdalraster::geos_version() $name [1] "3.12.1" $major [1] 3 $minor [1] 12 $patch [1] 1 ``` thanks!