clipboard: persist clipboard contents after source application closes

When the source application closes, the forked child continues serving
clipboard data so it remains available for paste operations.

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I14fbcf8cbc47c40bfa1da7f8b09245936a6a6964

src/main.rs

@@ -9,6 +9,7 @@ use clap::{CommandFactory, Parser, Subcommand};
 use humantime::parse_duration;
 use inquire::Confirm;
 
+mod clipboard;
 mod commands;
 pub(crate) mod db;
 pub(crate) mod mime;