Update build.yml and README.md for MATLAB test setup

Modified build.yml to streamline MATLAB unit test steps by removing OS check and updating file checks and copy operations. Updated README.md to note MEX-file compatibility with MATLAB and Octave.

.github/workflows/build.yml

@@ -52,15 +52,16 @@ jobs:
           cmake .. -DCMAKE_BUILD_TYPE=Release 
           cmake --build . --config Release -j
       - name: Prepare MATLAB unit tests
-        if: runner.os == 'Windows'
         shell: bash
         run: |
           # if on Windows, then this is the mex-file we need to copy to the tests/MATLAB folder
           if [ -f "build/MEXlibCZI/Release/MEXlibCZI.mexw64" ]; then
             cp "build/MEXlibCZI/Release/MEXlibCZI.mexw64" tests/MATLAB/
           fi
-      - name: Run statements
-        if: runner.os == 'Windows'
+          if [ -f "build/MEXlibCZI/MEXlibCZI.mexa64" ]; then
+            cp "build/MEXlibCZI/MEXlibCZI.mexa64" tests/MATLAB/
+          fi
+      - name: Run MATLAB unit tests
         uses: matlab-actions/run-command@v2
         with:
           command: cd tests/MATLAB; results = runtests, assertSuccess(results);

README.md

@@ -9,6 +9,8 @@ directly read and write [CZI-documents](https://www.zeiss.com/microscopy/int/pro
 It is based on [libCZI](https://github.com/ptahmose/libCZI).
 ![MEXlibCZI](./doc/pictures/intro.PNG "MEXlibCZI")
 
+This project provides a MEX-file for use with MATLAB and Octave.
+
 The available commands are documented here: [commands](./doc/commands.markdown)
 
 # Installing