[751][libnetcdfutils] Added isnan checks to scaledNcVar

Squashed commit of the following:

commit da626e47
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Dec 3 14:24:14 2024 -0500

    [751][libnecdfutils] Improved documentation, made better use of existing functions

commit 36446600
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Dec 3 10:36:42 2024 -0500

    [751][libnetcdfutils] Changed the behavior and signature of getDimsSize()

commit 476f859f
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Dec 3 14:34:11 2024 +0000

    [751][libnetcdfutils] Fixed an issue with copying a variable

commit 1c9a541b
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Dec 3 13:19:18 2024 +0000

    [751][libnetcdfutils] Quieted a warning, fixed a compilation error

commit 2c5c8f6d
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Tue Dec 3 08:07:42 2024 -0500

    [#751][libnetcdfutils] Added isnan checks

commit f5de3a71
Author: Jakob Lindo <jakob.c.lindo@nasa.gov>
Date:   Mon Dec 2 15:04:47 2024 -0500

    [751][libnetcdfutils] Added some testing around NaNs