Add .gitignore and initial project files

examples/run_demo.py

@@ -0,0 +1,28 @@
+"""Drives examples/demo_tui.py inside tmux and captures a couple of PNG frames.
+
+Run with: uv run python examples/run_demo.py
+"""
+import time
+from pathlib import Path
+
+from tmux_shot import TmuxApp
+
+ROOT = Path(__file__).resolve().parent.parent
+OUT = ROOT / "out"
+OUT.mkdir(exist_ok=True)
+DEMO_SCRIPT = Path(__file__).resolve().parent / "demo_tui.py"
+
+app = TmuxApp("tmux_shot_demo", command=f"python3 {DEMO_SCRIPT}", width=80, height=24)
+time.sleep(0.3)  # let curses draw the first frame
+app.screenshot(OUT / "demo_1.png")
+
+for key in ("Down", "Down", "Right", "Right", "Right"):
+    app.send_keys(key, enter=False)
+time.sleep(0.2)
+app.screenshot(OUT / "demo_2.png")
+
+app.send_keys("q")
+app.kill()
+
+print(f"wrote {OUT / 'demo_1.png'}")
+print(f"wrote {OUT / 'demo_2.png'}")