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

.agents/skills/tui-explorer/references/replay.md

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+# Replay
+
+Run:
+- `skills/tui-explorer/scripts/tui_explorer verify --spec "<acceptance.md>"`
+
+## Execution model
+- Spawn a fresh session per scenario.
+- Execute each step in order.
+- Use `wait --assert` for `expect` steps.
+- Stop on first scenario failure (fail-fast).
+
+## Result contract
+- Exit `0`: all scenarios pass.
+- Exit `1`: scenario/assertion failure.
+- Exit `2`: spec validation error.
+- Exit `69`: agent-tui/daemon unavailable.
+
+## Failure artifacts
+- `verify-report.json`
+- `failures/<scenario>-step-<n>.txt`