Add Adaptive Lighting Mode System foundation (Phase 1)

Implement the foundation for a comprehensive mode-based lighting control
system for Inovelli Blue Dimmer Switches with Adaptive Lighting integration.

This Phase 1 implementation includes:

- Global mode definitions package (packages/adaptive_lighting_global.yaml)
  containing ROYGBIV color scheme mappings and mode settings for all
  standard modes (Adaptive, Reading, Theater, Sleep, etc.)

- Inovelli mode cycling blueprint (blueprints/automation/inovelli_mode_cycling.yaml)
  enabling config button to cycle through lighting modes with LED feedback

- Updated README with system overview, features, and quick start guide

The system provides room-specific lighting modes with visual LED feedback,
config button control, and git-trackable configuration via Home Assistant
packages.

Next phases will add mode application automations, button action blueprints,
presence integration, and comprehensive documentation.

blueprints/automation/inovelli_mode_cycling.yaml

@@ -0,0 +1,92 @@
+# blueprints/automation/inovelli_mode_cycling.yaml
+#
+# Inovelli Config Button Mode Cycling
+#
+# Cycles through lighting modes when the config button is pressed on an
+# Inovelli Blue Dimmer Switch (VZM31-SN) via Zigbee2MQTT.
+#
+# Features:
+# - Cycles through available modes in input_select
+# - Updates LED color to match new mode (ROYGBIV scheme)
+# - Flashes LED to confirm mode change (3-second pulse)
+#
+# Requirements:
+# - Inovelli Blue Dimmer (VZM31-SN) paired with Zigbee2MQTT
+# - input_select helper with available modes
+# - packages/adaptive_lighting_global.yaml for mode colors
+#
+# Reference: ADAPTIVE_LIGHTING_CONTROL_SYSTEM_DESIGN.md lines 144-182
+
+blueprint:
+  name: Inovelli Config Button Mode Cycling
+  description: Press config button to cycle through lighting modes with LED feedback
+  domain: automation
+  input:
+    switch_action_sensor:
+      name: Switch Action Sensor
+      description: The sensor entity that reports button presses (sensor.xxx_action)
+      selector:
+        entity:
+          domain: sensor
+          integration: mqtt
+
+    mode_input_select:
+      name: Mode Input Select
+      description: The input_select helper that tracks current lighting mode
+      selector:
+        entity:
+          domain: input_select
+
+    led_color_entity:
+      name: LED Color Entity
+      description: The number entity for LED color when on (number.xxx_led_color_when_on)
+      selector:
+        entity:
+          domain: number
+
+    zigbee2mqtt_device_name:
+      name: Zigbee2MQTT Device Name
+      description: The device name in Zigbee2MQTT (for LED flash effect via MQTT)
+      example: "bedroom_switch"
+      selector:
+        text:
+
+mode: single
+max_exceeded: silent
+
+trigger:
+  - platform: state
+    entity_id: !input switch_action_sensor
+    to: "config_single"
+
+action:
+  - variables:
+      mode_select: !input mode_input_select
+      current_mode: "{{ states(mode_select) }}"
+      available_modes: "{{ state_attr(mode_select, 'options') }}"
+      current_index: "{{ available_modes.index(current_mode) }}"
+      next_index: "{{ (current_index + 1) % (available_modes | length) }}"
+      next_mode: "{{ available_modes[next_index] }}"
+      mode_colors: "{{ state_attr('input_text.adaptive_lighting_mode_colors', 'state') | from_json }}"
+      next_color: "{{ mode_colors.get(next_mode, 170) }}"
+
+  # Change to next mode
+  - service: input_select.select_option
+    target:
+      entity_id: !input mode_input_select
+    data:
+      option: "{{ next_mode }}"
+
+  # Update LED color
+  - service: number.set_value
+    target:
+      entity_id: !input led_color_entity
+    data:
+      value: "{{ next_color }}"
+
+  # Flash LED to confirm mode change (3-second pulse)
+  - service: mqtt.publish
+    data:
+      topic: "zigbee2mqtt/{{ zigbee2mqtt_device_name }}/set"
+      payload: >-
+        {"led_effect": {"effect": "pulse", "color": {{ next_color }}, "level": 100, "duration": 3}}