Add mvx self-build capability and fix CGO handling

- Add build and test commands to .mvx/config.json5 so mvx can build itself
- Fix CGO_ENABLED handling in release workflow for macOS compatibility
- Use CGO_ENABLED=1 for macOS builds, CGO_ENABLED=0 for other platforms
- mvx can now build itself with './mvx build' (basic build)
- Makefile still provides platform-optimized builds with proper flags

This prepares for v0.3.0 release and future transition to mvx-only builds.

Author: gnodet

.github/workflows/release.yml

@@ -66,19 +66,20 @@ jobs:
         env:
           GOOS: ${{ matrix.goos }}
           GOARCH: ${{ matrix.goarch }}
-          CGO_ENABLED: 0
+          # Use CGO_ENABLED=1 for macOS to avoid security restrictions, 0 for others
+          CGO_ENABLED: ${{ matrix.goos == 'darwin' && '1' || '0' }}
         run: |
           BINARY_NAME="mvx-${{ matrix.goos }}-${{ matrix.goarch }}${{ matrix.suffix }}"
-          
+
           go build \
             -ldflags "-s -w -X main.Version=${{ steps.version.outputs.version_no_v }} -X main.Commit=${{ github.sha }} -X main.Date=$(date -u +%Y-%m-%dT%H:%M:%SZ)" \
             -o "dist/${BINARY_NAME}" \
             .
-          
+
           # Create checksums
           cd dist
           sha256sum "${BINARY_NAME}" > "${BINARY_NAME}.sha256"
-          
+
           echo "Built: ${BINARY_NAME}"
           ls -la "${BINARY_NAME}"*
 

.mvx/config.json5

@@ -27,6 +27,18 @@
 
   // Custom commands
   commands: {
+    build: {
+      description: "Build mvx binary (use make build for platform-optimized builds)",
+      script: "go build -o mvx-binary .",
+      override: true
+    },
+
+    test: {
+      description: "Run all tests",
+      script: "go test -v ./...",
+      override: true
+    },
+
     hello: {
       description: "Say hello",
       script: "echo Hello from mvx! && mvn -v"