Switch remote deploy to vendored source builds

Move remote deployment to a vendored source bundle built on the target host via Docker so redeploys no longer require local cross-compilation or host Go installation.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

vendor/github.com/wailsapp/go-webview2/pkg/edge/chromium_amd64.go

@@ -0,0 +1,19 @@
+//go:build windows
+// +build windows
+
+package edge
+
+import (
+	"github.com/wailsapp/go-webview2/internal/w32"
+)
+
+func (e *Chromium) SetSize(bounds w32.Rect) {
+	if e.controller == nil {
+		return
+	}
+
+	err := e.controller.PutBounds(bounds)
+	if err != nil {
+		e.errorCallback(err)
+	}
+}