add AI agents files

.opencode/skills/daisyui/components/countdown.md

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+### countdown
+Countdown gives you a transition effect when you change a number between 0 to 999
+
+[countdown docs](https://daisyui.com/components/countdown/)
+
+#### Class names
+- component: `countdown`
+
+#### Syntax
+```html
+<span class="countdown">
+  <span style="--value:{number};">number</span>
+</span>
+```
+
+#### Rules
+- The `--value` CSS variable and text must be a number between 0 and 999
+- you need to change the span text and the `--value` CSS variable using JS
+- you need to add `aria-live="polite"` and `aria-label="{number}"` so screen readers can properly read changes