Update wiki coverage for current PowerSync features
docs: align wiki setup flow order
docs: refresh PowerSync wiki
docs(wiki): add AC inverter curtailment guide + full readability pass
Add a new AC-Inverter-Curtailment.md page with per-brand setup guides for
all nine supported AC-coupled solar inverter brands (Sungrow SG, Fronius,
Huawei, Enphase, GoodWe, Zeversolar, Solax, Sigenergy, AlphaESS, FoxESS),
covering connection settings, prerequisites, supported models, and
brand-specific options such as Fronius load-following mode and Enphase JWT
authentication.
Across all twelve wiki files, remove developer-facing content that has no
value to end users: Modbus register numbers, gain/scale/offset values,
internal API endpoint paths, Python library names, code architecture terms,
and implementation-detail notes (sign conventions, flash wear, write-order
requirements, LP internals). Simplify jargon throughout — DOD explained in
plain English, DPEL/SunSpec terms replaced with plain descriptions, Flow
Power PEA formulas converted to prose. Fix stale entity IDs in
Installation.md to match the power_sync_ prefix used across the rest of the
wiki. Replace EV power-sharing math blocks with a two-paragraph plain-English
explanation.