Initial release v1.1.0 — ESP32 automated telescope flat panel

Firmware (Arduino Nano ESP32 / PlatformIO):
- Native ASCOM Alpaca CoverCalibrator REST API on port 11111
- Alnitak serial protocol on USB at 9600 baud (simultaneous with WiFi)
- MG995 servo cover mechanism with non-blocking state machine (D9)
- LED brightness PWM via IRLZ44N MOSFET, LEDC channel 0 (D3)
- 12V dew heater PWM via IRLZ44N MOSFET, LEDC channel 1 (D5)
- mDNS + UDP Alpaca discovery, WiFi watchdog reconnect
- SERIAL_DEBUG flag to silence debug output in USB-only mode

INDI driver (C++ / libcurl / nlohmann-json):
- WiFi mode: HTTP Alpaca via libcurl
- USB mode: Alnitak serial via POSIX termios
- LightBoxInterface + DustCapInterface + dew heater number property

Python controller (PyQt6):
- Dark-themed desktop app for direct manual control
- AlpacaBackend (requests) + AlnitakBackend (pyserial)
- PollWorker QThread; cover, brightness, dew heater panels
- QSettings persistence; auto serial port discovery

Docs:
- system-diagram.svg, wiring-diagram.svg (browser-renderable SVG)
- BUILD_NOTES.md with BOM, LM2596 calibration, power-on checklist
- WIRING.md quick-reference, README.md, CHANGELOG.md

indi-driver/CMakeLists.txt

@@ -0,0 +1,39 @@
+cmake_minimum_required(VERSION 3.16)
+project(indi_esp32_flatpanel CXX)
+
+set(CMAKE_CXX_STANDARD 17)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+# Find required packages
+find_package(INDI    REQUIRED)
+find_package(CURL    REQUIRED)
+
+# nlohmann/json – header-only, installed via `apt install nlohmann-json3-dev`
+# or fetched automatically below if not found
+find_package(nlohmann_json QUIET)
+if(NOT nlohmann_json_FOUND)
+    include(FetchContent)
+    FetchContent_Declare(json
+        URL https://github.com/nlohmann/json/releases/download/v3.11.3/json.tar.xz)
+    FetchContent_MakeAvailable(json)
+endif()
+
+include_directories(${INDI_INCLUDE_DIR})
+
+add_executable(indi_esp32_flatpanel
+    indi_esp32_flatpanel.cpp
+)
+
+target_link_libraries(indi_esp32_flatpanel
+    ${INDI_LIBRARIES}
+    CURL::libcurl
+    nlohmann_json::nlohmann_json
+    pthread
+)
+
+# Install binary and XML descriptor
+install(TARGETS indi_esp32_flatpanel
+    RUNTIME DESTINATION ${CMAKE_INSTALL_PREFIX}/bin)
+
+install(FILES indi_esp32_flatpanel.xml
+    DESTINATION ${INDI_DATA_DIR})