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/wails/v2/pkg/runtime/clipboard.go

@@ -0,0 +1,13 @@
+package runtime
+
+import "context"
+
+func ClipboardGetText(ctx context.Context) (string, error) {
+	appFrontend := getFrontend(ctx)
+	return appFrontend.ClipboardGetText()
+}
+
+func ClipboardSetText(ctx context.Context, text string) error {
+	appFrontend := getFrontend(ctx)
+	return appFrontend.ClipboardSetText(text)
+}