InkHUD2 — Completely Rewritten E-Ink UI

New graphics architecture designed specifically for e-ink displays on Meshtastic devices:

• Modular architecture
• Unified CJK font with Japanese (Chinese or Korean), and Cyrillic support
• Optimized screen refresh
• Ghosting protection
• No GFX inheritance hell
• PIN hide feature
• Automatic node settings backup
• GPS position with compass

Fully Supported Hardware:

• LilyGo T-Echo Plus (nRF52840 + GDEY0154D67 e-ink)
• Heltec Vision Master E290 (ESP32-S3 + DEPG0290BNS800 2.9" e-ink)
• Heltec Wireless Paper (ESP32-S3 + 2.13" e-ink, 250x122)

User guide for InkHUD2 on T-Echo Plus:

• Read HOWTO.md

Implementation Guide:

• Read PATCHES.md and CJK_Unified_Font_Implementation

Release Notes:

• Read RELEASE_NOTES.md

Merge branch:

• Japanese/Latin/Cyrillic font included by default (just replace it with Chinese/Korean one if needed): https://github.com/kuroanji/firmware/tree/InkHUD2
• Instructions for adding the hide_pin field to Meshtastic protobufs: HIDE_PIN_PROTOBUF.md