feat: add camera module component (CSI, libcamera, photo + video)

[sakshar2303]

Summary

Closes #371

What's Added

Helper Class

• CameraHelper.java in pi4micronaut-utils/src/main/java/com/opensourcewithslu/inputdevices/
• Wraps libcamera-still and libcamera-vid via Java ProcessBuilder
• Supports 1080p@30fps, 720p@60fps, 480p@60/90fps
• Methods: initialize(), capturePhoto(), startVideoCapture(),
  stopVideoCapture(), setResolution(), setFrameRate(), cleanup()
• Full SLF4J logging and graceful error handling

Controller Class

• CameraController.java in components/src/main/java/com/opensourcewithslu/components/controllers/
• REST endpoints: /camera/capture, /camera/startVideo,
  /camera/stopVideo, /camera/setResolution, /camera/setFrameRate,
  /camera/status

Configuration

• Added camera: block to application.yml with resolution and
  frame-rate settings

Tests

• CameraHelperTest.java in pi4micronaut-utils/src/test/java/com/opensourcewithslu/inputdevices/
• 25 JUnit Jupiter tests covering initialization, configuration,
  error paths, edge cases and state validation

Documentation

• camera.adoc in pi4micronaut-utils/src/docs/asciidoc/components/inputComponents/
• Includes component overview, assembly instructions, circuit and
  schematic diagrams, YAML config, API usage examples, troubleshooting
  guide and dynamically linked example controller

[sakshar2303]

I have implemented the camera module component in here ,

Here's what was done:

• CameraHelper.java — wraps libcamera-still and libcamera-vid via
  Java ProcessBuilder. Supports 1080p@30fps, 720p@60fps, 480p@60/90fps
  with full error handling and SLF4J logging
• CameraController.java — REST endpoints for capture, startVideo,
  stopVideo, setResolution, setFrameRate and status
• application.yml — added camera config block (resolution + frame-rate)
• CameraHelperTest.java — 25 JUnit Jupiter tests covering all methods,
  error paths and edge cases
• camera.adoc — full documentation with assembly instructions, circuit
  diagram, YAML config, API examples and troubleshooting guide .

Please review and merge .