feat: Add Camera Settings dialog for UVC controls and Qt parameters

- Implemented CameraSettingsDialog to manage UVC and Qt camera controls.
- Integrated UVC parameter sliders and auto controls for brightness, contrast, saturation, hue, sharpness, gamma, white balance, backlight compensation, and exposure.
- Added functionality to change white balance and exposure settings via Qt controls.
- Updated MainWindow to open CameraSettingsDialog and manage UVC controller lifecycle.
- Enhanced AppMenuBar to include a Camera Settings option.
- Created tests for UVC controller abstraction layer and parameter info.
- Documented camera specifications and supported features in new markdown files.

app/camera/uvc/base.py

@@ -0,0 +1,77 @@
+"""UVC controller abstract base class."""
+
+from __future__ import annotations
+
+from abc import ABC, abstractmethod
+from dataclasses import dataclass
+from enum import Enum, auto
+
+
+class UvcParam(Enum):
+    """UVC video proc amp controls supported by the ELP camera."""
+    BRIGHTNESS = auto()
+    CONTRAST = auto()
+    SATURATION = auto()
+    HUE = auto()
+    SHARPNESS = auto()
+    GAMMA = auto()
+    WHITE_BALANCE = auto()
+    BACKLIGHT_COMPENSATION = auto()
+    EXPOSURE = auto()
+
+
+@dataclass
+class UvcParamInfo:
+    """Range and current value of a single UVC control."""
+    param: UvcParam
+    supported: bool
+    minimum: int = 0
+    maximum: int = 100
+    default: int = 50
+    current: int = 50
+    step: int = 1
+    auto_supported: bool = False
+    auto_enabled: bool = False
+
+
+class UvcControllerBase(ABC):
+    """
+    Abstract interface for platform-specific UVC camera controls.
+
+    All set_* methods are best-effort: if a control is unsupported the
+    call should silently do nothing (log at DEBUG level).
+    """
+
+    @abstractmethod
+    def open(self, device_name: str) -> bool:
+        """Open connection to the named camera device. Returns True on success."""
+
+    @abstractmethod
+    def close(self) -> None:
+        """Release the camera device handle."""
+
+    @abstractmethod
+    def is_open(self) -> bool:
+        """Return True if the device is currently open."""
+
+    @abstractmethod
+    def get_param_info(self, param: UvcParam) -> UvcParamInfo:
+        """Return range + current value for the given control."""
+
+    @abstractmethod
+    def get_all_params(self) -> list[UvcParamInfo]:
+        """Return info for all known UVC controls."""
+
+    @abstractmethod
+    def set_value(self, param: UvcParam, value: int) -> bool:
+        """
+        Set a control to an integer value.
+        Returns True if the call succeeded.
+        """
+
+    @abstractmethod
+    def set_auto(self, param: UvcParam, enabled: bool) -> bool:
+        """
+        Enable/disable auto mode for a control (e.g. auto white balance).
+        Returns True if supported and the call succeeded.
+        """