`SimpleAdder.fmu` example lacks Windows binaries and clear usage instructions

[maysam-gholampour]

In the example demonstrating how to import SimpleAdder.fmu, the FMU file only includes Linux binaries and lacks support for Windows platforms. This makes it incompatible for users working on Windows systems.

I can provide a version that includes Windows binaries generated using OpenModelica, but I believe it would be safer and more consistent if the maintainers regenerated the FMU on their end.

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💡 Suggestions

1. Add a Warning Block
   Include a note in the documentation/example clarifying that users may need to generate their own FMU if they are on a different platform. You could also share the SimpleAdder.mo source file (which is already available) and point users to tools like OpenModelica for FMU export.

2. Clarify FMU Path Requirements
   The current example assumes the FMU is in the test/fmi/fmus/ directory. However, many users may copy the example elsewhere. Please include a note block stating that users should:

   • Ensure a copy of SimpleAdder.fmu is placed in the working directory.

   • Modify the loadFMU path accordingly:

     fmu = loadFMU(joinpath(@__DIR__, "SimpleAdder.fmu"); type = :ME)

3. Optional: Use ModelingToolkit Package Path
   If you prefer referencing the internal FMU in tests, this approach works:

   pkg_path = Base.identify_package("ModelingToolkit") |> Base.locate_package |> dirname |> dirname
   fmu = loadFMU(joinpath(pkg_path, "test", "fmi", "fmus", "SimpleAdder.fmu"); type = :ME)

   However, this is more suitable for internal testing and may be confusing for new users. Explicitly copying the FMU and setting the path is likely more user-friendly.

[maysam-gholampour]

The following .mos file worked for me.

loadFile("SimpleAdder.mo");getErrorString();

installPackage(Modelica);

setCommandLineOptions("+target=msvc15");getErrorString();
setCommandLineOptions("--generateSymbolicJacobian=false");getErrorString();
setCommandLineOptions("--fmuRuntimeDepends=none");getErrorString();

system("mkdir -p output");
cd("output");getErrorString();
buildModelFMU(SimpleAdder, version="2.0", fmuType="me_cs");getErrorString();
system("unzip -l SimpleAdder.fmu | grep -vE 'sources|files' | tail -n+3 | grep -o '[A-Za-z._0-9/]*$' > BB.log");

I executed it using Git Bash on Windows 10.

[ChrisRackauckas]

I'm not near my Windows computer. @ranjanan can you run and PR it?