chore: bump version to 1.2.3 and update Windows installer docs

FilantropiaSolar v1.2.2: DST duplicate-hour merge fix; metadata path …

…update; ranking assignment robustness

FilantropiaSolar v1.2.1: Custom Station simulation, 21-day window, co…

…ord resolution improvements, UX tweak

FilantropiaSolar v1.1.2: baseline overlay, ranking API hardened, nigh…

…t radiation fix, docs/scripts

FilantropiaSolar v1.0.3 - Smart Caching Edition…

Version 1.0.2: Enhanced Interactive Charts & UI Improvements. Key Fea…

…tures: • Professional chart legends positioned on the right • Comprehensive weather analysis (5 parameters) • Improved daily overview with humidity + cloud cover • Enhanced UI/UX with better layouts • Fixed secondary axis management • Optimized chart performance and styling

FilantropiaSolar v1.0.0 - Production Release: main.py entry point, 9 …

…PV installations, enhanced ML models