Stable 2.2 release
This promotes the community-tested v2.2.0 beta firmware to a stable release and adds a minor OTA HTTP-header parsing correction.
- One-click over-the-air updates for Pico 2 W and Waveshare RP2350B-Plus-W, with HTTPS download and SHA-256 verification before installation.
- Stable and pre-release update-channel selection from the on-device config page.
- Opt-in support for up to four simultaneous DualSense controllers; audio and HD haptics remain single-controller features.
- Board-specific Pico 2 W, Waveshare, and Pico W firmware assets.
- Correctly preserves the final HTTP header value when headers and body data arrive together during OTA requests.
Settings, WiFi credentials, and paired controllers are preserved when updating.