Fix: Go WASM global constructor conflict
Problem: Importing @reteps/dockerfmt overwrote globalThis.Go, breaking other Go WASM packages (e.g. sh-syntax) that rely on their own wasm_exec.js with different capabilities like WASI support.
Fix: The Go class is now scoped under globalThis.__dockerfmt_Go instead of clobbering globalThis.Go. Any previously set Go constructor is preserved.