feat(ask): add preview pane and wrapped content

tests/text.test.ts

@@ -0,0 +1,29 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+import { wrapText } from "../src/text.ts";
+
+test("wrapText wraps prose", () => {
+	assert.deepEqual(wrapText("hello world from pi", 8), [
+		"hello",
+		"world",
+		"from pi",
+	]);
+});
+
+test("wrapText preserves blank lines and indentation", () => {
+	assert.deepEqual(wrapText("Title\n\n  indented text", 12), [
+		"Title",
+		"",
+		"  indented",
+		"  text",
+	]);
+});
+
+test("wrapText breaks long words", () => {
+	assert.deepEqual(wrapText("supercalifragilistic", 5), [
+		"super",
+		"calif",
+		"ragil",
+		"istic",
+	]);
+});