Add dummy platform 🌮

src/platform/dummy.rs

@@ -0,0 +1,23 @@
+use crate::ClipboardProvider;
+
+use raw_window_handle::HasRawWindowHandle;
+use std::error::Error;
+
+pub use clipboard_dummy as dummy;
+
+pub fn connect<W: HasRawWindowHandle>(
+    window: &W,
+) -> Result<Box<dyn ClipboardProvider>, Box<dyn Error>> {
+    let clipboard = Box::new(dummy::Clipboard::connect()?);
+    Ok(clipboard)
+}
+
+impl ClipboardProvider for dummy::Clipboard {
+    fn read(&self) -> Result<String, Box<dyn Error>> {
+        self.read()
+    }
+
+    fn write(&mut self, contents: String) -> Result<(), Box<dyn Error>> {
+        self.write(contents)
+    }
+}