core: textCallback to send text directly to the terminal

src/Surface.zig

@@ -1020,6 +1020,15 @@ pub fn keyCallback(
     return true;
 }
 
+/// Sends text as-is to the terminal without triggering any keyboard
+/// protocol. This will treat the input text as if it was pasted
+/// from the clipboard so the same logic will be applied. Namely,
+/// if bracketed mode is on this will do a bracketed paste. Otherwise,
+/// this will filter newlines to '\r'.
+pub fn textCallback(self: *Surface, text: []const u8) !void {
+    try self.completeClipboardPaste(text);
+}
+
 pub fn focusCallback(self: *Surface, focused: bool) !void {
     // Notify our render thread of the new state
     _ = self.renderer_thread.mailbox.push(.{

src/apprt/embedded.zig

@@ -686,19 +686,7 @@ pub const Surface = struct {
             return;
         };
 
-        // For a char callback we just construct a key event with invalid
+        _ = self.core_surface.textCallback(buf[0..len]) catch |err| {
-        // keys but with text. This should result in the text being sent
-        // as-is.
-        _ = self.core_surface.keyCallback(.{
-            .action = .press,
-            .key = .invalid,
-            .physical_key = .invalid,
-            .mods = .{},
-            .consumed_mods = .{},
-            .composing = false,
-            .utf8 = buf[0..len],
-            .unshifted_codepoint = 0,
-        }) catch |err| {
             log.err("error in key callback err={}", .{err});
             return;
         };