docs(dialogs): document interactive helpers

README.md

@@ -5,7 +5,7 @@ one consistent API on Windows and Linux.
 
 ## Features
 
-- Native open, save, folder, and message dialogs
+- Native open, save, folder, message, input, and color dialogs
 - UTF-8 text clipboard access
 - Standard application, user, temporary, and executable paths
 - Non-blocking process launch
@@ -52,6 +52,19 @@ if (auto selection = izo::OpenFile(options)) {
     izo::RevealInFileManager(selection.paths.front());
 }
 
+if (izo::ShowQuestionBox("Delete file?", "This cannot be undone.") ==
+    izo::MessageResponse::Yes) {
+    // Delete it.
+}
+
+if (auto name = izo::ShowInputBox({"Profile", "Display name:"})) {
+    // name.value contains the submitted UTF-8 text.
+}
+
+if (auto color = izo::PickColor({"Accent color", {32, 128, 255}})) {
+    // color.color contains the selected RGB channels.
+}
+
 auto config = izo::GetKnownPath(izo::KnownPath::Config);
 
 izo::ProcessOptions process;