Add ESP32-C3 SPI slave with ESP-NOW, Raspberry Pi test tools, and updated project structure

- ESP32-C3 SPI slave project with ESP-NOW broadcast functionality
- Raspberry Pi SPI master test tools and CLI for JSON communication
- Merged src/ directory from full branch with lighting controller code
- Updated Pipfile with system install scripts and ESP32 monitoring
- Added comprehensive test suite for SPI communication

esp32/build/log/idf_py_stderr_output_8250

@@ -0,0 +1,52 @@
+Command: cmake -G Ninja -DPYTHON_DEPS_CHECKED=1 -DPYTHON=/home/pi/.espressif/python_env/idf6.0_py3.11_env/bin/python -DESP_PLATFORM=1 -DCCACHE_ENABLE=False /home/pi/lighting-controller/esp32
+Configuration Report               
+ ───────────────────────────────── 
+   Parser Version: 1               
+   Verbosity: default              
+   Defaults policy: sdkconfig      
+   Status: Finished successfully   
+                                   
+ ───────────────────────────────── 
+CMake Warning at /home/pi/esp/esp-idf/tools/cmake/component_validation.cmake:106 (message):
+  Private include directory
+  '/home/pi/esp/esp-idf/components/wpa_supplicant/src' belongs to component
+  wpa_supplicant but is being used by component esp_wifi.  It is recommended
+  to define the component dependency for esp_wifi on the component
+  wpa_supplicant, i.e.  'idf_component_register(...  PRIV_REQUIRES
+  wpa_supplicant)' in the CMakeLists.txt of esp_wifi, and specify the
+  included directory as idf_component_register(...  PRIV_INCLUDE_DIRS <dir
+  relative to component>) in the CMakeLists.txt of component wpa_supplicant.
+Call Stack (most recent call first):
+  /home/pi/esp/esp-idf/tools/cmake/component_validation.cmake:130 (__component_validation_check_include_dirs)
+  /home/pi/esp/esp-idf/CMakeLists.txt:338 (__component_validation_run_checks)
+
+
+CMake Warning at /home/pi/esp/esp-idf/tools/cmake/component_validation.cmake:106 (message):
+  Private include directory
+  '/home/pi/esp/esp-idf/components/wpa_supplicant/esp_supplicant/src' belongs
+  to component wpa_supplicant but is being used by component esp_wifi.  It is
+  recommended to define the component dependency for esp_wifi on the
+  component wpa_supplicant, i.e.  'idf_component_register(...  PRIV_REQUIRES
+  wpa_supplicant)' in the CMakeLists.txt of esp_wifi, and specify the
+  included directory as idf_component_register(...  PRIV_INCLUDE_DIRS <dir
+  relative to component>) in the CMakeLists.txt of component wpa_supplicant.
+Call Stack (most recent call first):
+  /home/pi/esp/esp-idf/tools/cmake/component_validation.cmake:130 (__component_validation_check_include_dirs)
+  /home/pi/esp/esp-idf/CMakeLists.txt:338 (__component_validation_run_checks)
+
+
+CMake Warning at /home/pi/esp/esp-idf/tools/cmake/component_validation.cmake:106 (message):
+  Private include directory
+  '/home/pi/esp/esp-idf/components/esp_wifi/wifi_apps/roaming_app/include'
+  belongs to component esp_wifi but is being used by component
+  wpa_supplicant.  It is recommended to define the component dependency for
+  wpa_supplicant on the component esp_wifi, i.e.  'idf_component_register(...
+  PRIV_REQUIRES esp_wifi)' in the CMakeLists.txt of wpa_supplicant, and
+  specify the included directory as idf_component_register(...
+  PRIV_INCLUDE_DIRS <dir relative to component>) in the CMakeLists.txt of
+  component esp_wifi.
+Call Stack (most recent call first):
+  /home/pi/esp/esp-idf/tools/cmake/component_validation.cmake:130 (__component_validation_check_include_dirs)
+  /home/pi/esp/esp-idf/CMakeLists.txt:338 (__component_validation_run_checks)
+
+