feat: Add agent-tui and tui-explorer skills with comprehensive documentation and scripts

.agents/skills/agent-tui/references/demo.md

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+# Live Demo Script
+
+Goal: show a real terminal app launch, capture screenshots, send keystrokes, and verify outcomes in real-time.
+
+## Suggested Demo (htop)
+
+### Step 1: Launch
+```bash
+agent-tui run htop
+```
+
+### Step 2: Observe
+```bash
+agent-tui screenshot
+```
+Say: "Here is the current terminal screen. I'll keep re-snapshotting after each action."
+
+### Step 3: Interaction
+```bash
+agent-tui press F10
+```
+Say: "I'm sending a keypress to exit."
+
+### Step 4: Verify
+```bash
+agent-tui wait "Quit" --gone
+```
+Say: "I wait for the expected text to disappear to confirm the app closed."
+
+### Step 5: Cleanup
+```bash
+agent-tui kill --yes
+```
+
+## Narration Tips
+- Emphasize the observe/act/wait loop.
+- Call out that every action is followed by a fresh snapshot.
+- Highlight using `wait --stable` when the UI is changing.