Enhance plugins section with Grafana integration info

Updated the plugins section to include Grafana integration details.

0.3.3 — Emoji/CJK rendering, refresh rate & UX fixes

0.3.2 — refresh rate, custom widget data & Docker fixes

0.3.1 — firmware 1.7.8 connectivity & display fixes

0.3.1 — custom port and HTTPS proxy fixes

v0.2.1.1 — API quota protection, caching improvements

v0.2.1

v0.2.0 — BYOD support, canvas zoom, CORS hardening, local network dat…

…a sources

- BYOD: Register any e-ink device manually with custom resolution
- Canvas zoom: Auto-fit, +/-/fit controls, Ctrl+scroll
- Alternative device types: /api/setup HTTP_MODEL header → dimensions lookup
- Local network data sources: Settings toggle with SSRF safety guardrails
- CORS: Same-origin default, opt-in via CORS_ORIGINS env
- Models tab removed (devices have width/height, designer has presets)
- Dashboard Connect Device buttons redirect to /devices/new
- Version bumped to 0.2.0 across all packages and Swagger

Inker v0.1.0 - Self-hosted e-ink device management system

Full-stack application for managing TRMNL e-ink displays with
screen designer, playlist management, custom widgets, and OTA updates.