Run plugin on CPU even if NVIDIA GPU is detected if the C++ / CUDA compiled files are not present

[Marc-Demoustier]

The plugin is not working correctly if an NVIDIA GPU is detected but the .dll are not present. We should be able to just send a warning and then run on the CPU.

[Marc-Demoustier]

It is a bit more complicated than that in the end. The current stade of the jar plugin contains all the dll files inside of the jar files and if they are not in the jar folder of Fiji it will copy them to this folder. This introduce duplication which is not optimal for the plugin.

We can think of two ways of doing it:

• Either we build the jar files with all the .dll and the .so file inside and we just load them in the code from the jar file.
• Or we upload the jar files without any libs and with a dependencies folder on the side (I think it is possible). We can then separate the dependencies folder between win64 and linux which will help to understand better the file architecture for a power user. Unfortunately, Fiji doesn't support detection of the OS when you download a plugin. If it was the case we wouldn't need to download all the .dll files for Linux and MacOS, but it is what it is...

https://imagej.net/develop/uploading-plugins

(We can even think of uploading the plugin directly from the CI but maybe this is too much automatization)