Relocate bundled demo sources into bundled-demos/demo/

Mirror bundled-lib/ by keeping manifest.json at the bundle root and
shipping sample .py files from a demo/ subdirectory.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/static/bundled-demos/demo/led_tutorial.py

@@ -0,0 +1,50 @@
+"""LED tutorial script for NeoPixel in the browser editor.
+
+Run this file and watch the in-app NeoPixel simulator panel.
+"""
+
+from machine import Pin
+import neopixel
+import time
+
+
+LED_COUNT = 12
+np = neopixel.NeoPixel(Pin(4), LED_COUNT)
+
+
+def show_step(title: str):
+    print(f"\n--- {title} ---")
+
+
+show_step("Step 1: single colors")
+np.fill((0, 0, 0))
+np.write()
+time.sleep(0.2)
+np[0] = (255, 0, 0)  # red
+np[1] = (0, 255, 0)  # green
+np[2] = (0, 0, 255)  # blue
+np.write()
+time.sleep(0.8)
+
+show_step("Step 2: fill strip")
+np.fill((40, 0, 120))
+np.write()
+time.sleep(0.6)
+
+show_step("Step 3: moving pixel")
+for i in range(len(np)):
+    np.fill((0, 0, 0))
+    np[i] = (255, 120, 0)
+    np.write()
+    time.sleep(0.06)
+
+show_step("Step 4: simple pulse")
+for level in list(range(0, 200, 20)) + list(range(200, -1, -20)):
+    np.fill((level, 0, level // 3))
+    np.write()
+    time.sleep(0.05)
+
+show_step("Done")
+np.fill((0, 0, 0))
+np.write()
+print("Tutorial complete.")