2.9.0 — Optoma UHD60 profile, one-click HACS install

Added

• Optoma UHD60 projector profile — Power, AV/Audio Mute, Image Freeze, 3D, Input Source (HDMI1/HDMI2/VGA), Picture Mode, Aspect Ratio, 3D Format, Brightness/Contrast/Sharpness, Lamp Hours, Firmware Version, Serial Number, Resync, and test pattern support. Transcribed from Optoma's official RS232 Protocol Function List; not yet verified against real hardware — please open an issue/PR with corrections if you own this model.
• One-click install: README now leads with "Add to HACS" and "Start setup" badges (my.home-assistant.io redirects), instead of requiring you to manually open HACS's Custom repositories dialog.

Notes

• After updating, existing UHD60 users on the uhz68lv profile (the previous auto-detect fallback) should reconfigure the integration and explicitly pick Optoma UHD60 from the model dropdown — auto-detect doesn't reliably distinguish this model, so it needs a manual select.