terminal: expose kitty clipboard protocol (OSC 5522) for stream dispatch

src/terminal/kitty.zig

@@ -3,6 +3,7 @@
 const build_options = @import("terminal_options");
 
 const key = @import("kitty/key.zig");
+pub const clipboard = @import("kitty/clipboard.zig");
 pub const color = @import("kitty/color.zig");
 pub const graphics = if (build_options.kitty_graphics) @import("kitty/graphics.zig") else struct {};
 

src/terminal/osc/parsers/kitty_clipboard_protocol.zig

@@ -22,6 +22,12 @@ pub const OSC = struct {
     /// The terminator that was used in case we need to send a response.
     terminator: Terminator,
 
+    pub const C = void;
+
+    pub fn cval(_: OSC) C {
+        return {};
+    }
+
     /// Decode an option from the metadata.
     pub fn readOption(self: OSC, comptime key: Option) ?key.Type() {
         return key.read(self.metadata);