Add Pac-Man power-on flow and document Odin integration

- Add a four-second arcade-style boot sequence followed by the
  Character / Nickname introduction.
- Separate cabinet power-on from RFID credit and player Start.
- Add operator Power on control and cabinet power-state reporting.
- Prevent repeated power commands from restarting boot or gameplay.
- Ignore RFID scans received before the cabinet is ready.
- Add power-state, RFID, controller, and GPIO feedback regression tests.

- Expand the master walkthrough with export, packaging, file transfer,
  fresh-Pi setup, RFID compilation, and end-to-end testing instructions.
- Correct tester hardware documentation: BCM23/J20 drives an LED;
  physical buttons connect through a separate I2C1 input board.
- Document operator-triggered power-on as the current test workflow
  and retain the temporary 2.4 configuration compatibility notes.
- Record successful physical testing of power-on, RFID credit,
  and player Start.

- Add an Odin integration README describing the proposed Rust/NATS
  bridge, shared messages, Flutter GM interface, autopilot sequencing,
  hardware ownership, and Starfish SSH-management role.
- Define migration milestones and information needed from the
  framework owner; link the integration guide from the root README.

Validation: 69 controller tests, 10 GPIO tests, Pac-Man power/RFID
checks, managed-cabinet lifecycle checks, and visual screen inspection.

data/scenarios/pacman_rfid_credit_test.tres

@@ -1,15 +1,22 @@
-[gd_resource type="Resource" script_class="ScenarioDefinition" format=3]
+[gd_resource type="Resource" script_class="ScenarioDefinition" format=3 uid="uid://bnn41ffo1lhvy"]
 
-[ext_resource type="Script" path="res://core/scenarios/scenario_definition.gd" id="1"]
-[ext_resource type="Script" path="res://core/scenarios/scenario_assignment.gd" id="2"]
-[ext_resource type="Resource" path="res://data/cabinets/cabinet_01.tres" id="3"]
-[ext_resource type="Resource" path="res://data/games/pacman.tres" id="4"]
+[ext_resource type="Script" uid="uid://d3pt6qa05kcnl" path="res://core/scenarios/scenario_definition.gd" id="1"]
+[ext_resource type="Script" uid="uid://ibujr0ervhhq" path="res://core/scenarios/scenario_assignment.gd" id="2"]
+[ext_resource type="Resource" uid="uid://cl4j1vtv388pt" path="res://data/cabinets/cabinet_01.tres" id="3"]
+[ext_resource type="Script" uid="uid://lixrugm1v2d2" path="res://core/scenarios/scenario_event_mapping.gd" id="3_ut8lr"]
+[ext_resource type="Resource" uid="uid://c3v8o4nubjakg" path="res://data/games/pacman.tres" id="4"]
 
 [sub_resource type="Resource" id="Assignment"]
 script = ExtResource("2")
 cabinet = ExtResource("3")
 game = ExtResource("4")
-game_config = {"rfid_credit_device": "cab1_rfid1", "rfid_allowed_uids": [], "boards_to_win": 1, "score_to_win": 0}
+game_config = {
+"boards_to_win": 1,
+"power_on_device": "cab1_btn_ylw",
+"rfid_allowed_uids": [],
+"rfid_credit_device": "cab1_rfid1",
+"score_to_win": 0
+}
 
 [resource]
 script = ExtResource("1")