:zap: Command run added for apsim in Linux

[luanabeckerdaluz]

Bug description

I am using apsimx package in a Linux Mint environment. I was able to reproduce the same error by installing apsim in 2 different ways. I installed Apsim both by building from source code with dotnet and by downloading and install the .deb from the apsim website. In both cases, two files were generated in the apsim folder. (1) The apsim file which is the executable and need to be run using apsim run and (2) the ApsimNG file which is the executable to the interface. I used the function apsimx_options() to set the exe.path, but I am not able to run the apsim() function because if I set the ApsimNG as executable, it opens the interface with the simulation, and if I set the apsim as executable, the string run is missing in the command. I used the command dpkg --listfiles apsim to check the path where apsim was installed. In my case it is in the /usr/local/lib/apsim/2023.7.7283.0/bin/ folder where the files apsim and ApsimNG are located.

Suggestion

The apsim.R code should add the run string between the ada and the simulation name, or create a new condition. When forking and implementing this, the function apsim() from R package ran perfectly.

if(isFALSE(dotnet.flag) && isFALSE(mono.flag)){
  run.strng <- paste(ada, "run", file.name.path) 
}

This PR solves the Issue #128

[femiguez]

@luanabeckerdaluz Can you clarify if this is still needed? I can add a different flag that would work when running APSIM NG from source. I think I would prefer to add it as an argument in xargs_apsimx and also as a global option