Implement and expose read and write helpers for clipboard

src/clipboard.rs

@@ -0,0 +1,3 @@
+//! Access the clipboard.
+#[cfg(not(target_arch = "wasm32"))]
+pub use crate::runtime::clipboard::{read, write};

src/lib.rs

@@ -183,6 +183,7 @@ mod error;
 mod result;
 mod sandbox;
 
+pub mod clipboard;
 pub mod executor;
 pub mod keyboard;
 pub mod mouse;