dpg-gauges

Dear PyGui gauge widgets for dashboards and telemetry displays.

Current implementation status: Step 4 simple gauge rendering is implemented. Digital, bar, level, and status gauges render Dear PyGui drawlist visuals; bar and level gauges draw threshold bands and markers. Gauge creation functions still register pure gauge state without requiring a Dear PyGui context, and when a Dear PyGui context is active they create a group plus drawlist shell.

Runtime value updates are intended for the Dear PyGui GUI thread. Attached gauges redraw immediately for simple value/configuration changes.

Analog, segmented, compass, thermometer, battery, and multi-value visuals are scheduled for later steps and may still use placeholder rendering.