docs: 2-up image layout on PWA-Walkthrough + Local-Web-UI; embed schematics in Wiring pages
PWA-Walkthrough + Local-Web-UI now use <p align="center"><img width="38%"/>
<img width="38%"/></p> pairs instead of single full-width images. Half
the scrolling, natural visual pairing (light/dark variants, related
sections together).
Wiring-Reference-Hub + Wiring-Reference-Transmitter now embed the
REV 2.1 schematic PNGs (already on main at hardware/pcb/) at 95%
width, with high-res SVG + STEP-file links underneath.
docs(wiki): Wave 1 — Home, Quick Start, First Boot, Hardware Build, BOM, Wiring (Hub + TX), HACS, FAQ + Sidebar
Wave 1 covers the contributor + builder onramp:
- Home: landing + documentation map
- Quick Start: browser-flasher path, 5 steps to working hub
- First Boot: what every OLED screen + LED color means
- Hardware Build: full assembly walkthrough
- Bill of Materials: sourcing + Indian rupee costs + counterfeit warnings
- Wiring (Hub) + Wiring (TX): per-pin map + wire list per board
- HACS Integration: entities, automations, troubleshooting
- FAQ: common questions, grouped
- _Sidebar: nav across all pages
Wave 2 backlog (PWA walkthrough, Local Web UI, Troubleshooting,
Self-Host) tracked in cloud/wiki-drafts/README.md (private).