For macOS building in GHA, put castle-engine on $PATH, it is easier a…

…nd fixes VERSION=`castle-engine output version` call

.github/workflows/build.yml

@@ -99,8 +99,8 @@ jobs:
       # Setup Castle Game Engine
       - name: Castle Game Engine - Env CASTLE_ENGINE_PATH
         run: echo "CASTLE_ENGINE_PATH=$GITHUB_WORKSPACE/castle-engine" >> $GITHUB_ENV
-      - name: Castle Game Engine - Env BUILD_TOOL
-        run: echo "BUILD_TOOL=$CASTLE_ENGINE_PATH/tools/build-tool/castle-engine" >> $GITHUB_ENV
+      - name: Castle Game Engine - Env PATH (non-Windows)
+        run: echo "PATH=$PATH:$CASTLE_ENGINE_PATH/tools/build-tool/" >> $GITHUB_ENV
       - name: Castle Game Engine - Clone ${{ env.engine_tag }}
         run: git clone --depth 1 --single-branch --branch ${{ env.engine_tag }} https://github.com/castle-engine/castle-engine/
       - name: Castle Game Engine - Build
@@ -110,8 +110,8 @@ jobs:
       - name: Package (non macOS)
         if: ${{ matrix.runner != 'macos_x64' }}
         run: |
-          ${BUILD_TOOL} compile --manifest-name=CastleEngineManifest.converter.xml
-          ${BUILD_TOOL} package
+          castle-engine compile --manifest-name=CastleEngineManifest.converter.xml
+          castle-engine package
       - name: Package (macOS)
         if: ${{ matrix.runner == 'macos_x64' }}
         # Special order for macOS:
@@ -120,8 +120,8 @@ jobs:
         # - zip it manually
         # (TODO: we could add file to zip created by initial "package" instead?)
         run: |
-          ${BUILD_TOOL} compile --manifest-name=CastleEngineManifest.converter.xml
-          ${BUILD_TOOL} package --package-format=mac-app-bundle
+          castle-engine compile --manifest-name=CastleEngineManifest.converter.xml
+          castle-engine package --package-format=mac-app-bundle
 
           cp castle-model-converter castle-model-viewer.app/Contents/MacOS/
           VERSION=`castle-engine output version`