v0.5.0-beta.2 — integration overhaul

Second beta of the integration overhaul (PR #113). Pre-release — enable "show beta versions" in HACS to install. Restart Home Assistant after updating so translations reload.

New since v0.5.0-beta

• Two-step config flow: step 1 asks only for email + "plus"; step 2 lists the account's plants (new GET /plants) in a dropdown to select.
• Multiple plants: already-configured plants are filtered out so you can add more (one entry per plant); aborts when none remain.
• Portuguese fix: added translations/pt.json so Home Assistant set to "Português" (pt), not only "Português (Brasil)" (pt-BR), is fully translated.

Also included (from beta)

Bug fixes (power/Watts, currency, device IDs, awaited notifications), description-driven sensor refactor, multi-inverter + microinverter support (#104, credit @murilobast), automatic currency (#25), token caching, options/reauth flows, diagnostics.

Notes

• Built from the PR #113 branch (not yet merged into main).
• 26 pytest cases green; ruff, hassfest and HACS validation pass.
• Still pending live-HA verification — please report issues on the tracker.