add tui

internal/tui/checkbox.go

@@ -0,0 +1,24 @@
+package tui
+
+type Checkbox struct {
+	Label   string
+	Checked bool
+}
+
+func (c *Checkbox) Toggle() {
+	c.Checked = !c.Checked
+}
+
+func (c Checkbox) Render(focused bool) string {
+	marker := checkBoxUnchecked
+	if c.Checked {
+		marker = checkBoxChecked
+	}
+
+	style := labelStyle
+	if focused {
+		style = focusedStyle.Bold(true)
+	}
+
+	return style.Render(marker + " " + c.Label)
+}