Add Electron desktop edition with redesigned Liquid Glass UI

[wintrymichi]

Convert Windows Memory Cleaner into an Electron desktop app while keeping all native logic intact. Architecture:

• engine/ : headless C# engine (net10-windows) that performs the kernel-level memory optimizations (ported 1:1 from ComputerService), reports RAM stats/OS capabilities, lists processes, and persists settings to the SAME HKLM\SOFTWARE\WinMemoryCleaner registry keys (data preserved). Speaks newline-delimited JSON over stdio; runs elevated.
• main/ : Electron main process — frameless window, tray, global optimize
  hotkey, auto-optimization scheduler (interval + low-memory threshold),
  notifications, run-on-startup, engine spawn + protocol bridge.
• preload/ : minimal contextBridge API (contextIsolation on, nodeIntegration off).
• renderer/: redesigned "Liquid Glass" UI (aurora background, glass panels,
  radial gauges, live sparkline, dark/light themes).

The original WPF app under src/ is untouched.

Claude-Session: https://claude.ai/code/session_01NgB5SQs1gWMRze8Xo1ioo5

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