Add OS-specific readme files to plugin archives

.github/workflows/build.yml

@@ -75,6 +75,8 @@ jobs:
           # GitHub Action strips the top level directory, great, have another one
           mkdir -p "$ARCHIVE_NAME/$ARCHIVE_NAME"
           mv target/bundled/* "$ARCHIVE_NAME/$ARCHIVE_NAME"
+      - name: Add an OS-specific readme file with installation instructions
+        run: cp ".github/workflows/readme-${{ runner.os }}.txt" "$ARCHIVE_NAME/$ARCHIVE_NAME/README.txt"
       - uses: actions/upload-artifact@v2
         with:
           name: ${{ env.ARCHIVE_NAME }}

.github/workflows/readme-Linux.txt

@@ -0,0 +1,10 @@
+To install the VST3 plugins, copy the .vst3 _directories_ to:
+~/.vst3
+
+To install the CLAP plugins, copy the .clap files to:
+~/.clap
+
+You will need to create these directories yourself it they do not yet exist.
+
+See https://github.com/free-audio/clap#hosts for instructions on how to enable
+CLAP support in your DAW.

.github/workflows/readme-Windows.txt

@@ -0,0 +1,10 @@
+To install the VST3 plugins, copy the .vst3 _directories_ to:
+C:/Program Files/Common Files/VST3/
+
+To install the CLAP plugins, copy the .clap files to:
+C:/Program Files/Common Files/CLAP/
+
+You will need to create these directories yourself it they do not yet exist.
+
+See https://github.com/free-audio/clap#hosts for instructions on how to enable
+CLAP support in your DAW.

.github/workflows/readme-macOS.txt

@@ -0,0 +1,10 @@
+To install the VST3 plugins, copy the .vst3 _directories_ to:
+~/Library/Audio/Plug-Ins/VST3
+
+To install the CLAP plugins, copy the .clap files to:
+~/Library/Audio/Plug-Ins/CLAP
+
+You will need to create these directories yourself it they do not yet exist.
+
+See https://github.com/free-audio/clap#hosts for instructions on how to enable
+CLAP support in your DAW.