Add initial implementation of GeelectronDemo app

- Created main.js for the application logic, including tests for Electron app properties and methods.
- Added package.json to define app metadata.
- Included necessary code signature files for macOS app distribution.
- Implemented basic window management and event handling in the app.

ELECTRON_API_STATUS.md

@@ -0,0 +1,56 @@
+# Gelectron — Electron API Compatibility Status
+
+## FULL (2)
+| Module        | Notes |
+|---------------|-------|
+| app           | All methods/properties/events, quit lifecycle, dock, badge, GPU, about panel, secure keyboard entry, window tracking |
+| ipcMain       | handle/handleOnce/on/once/removeHandler, full EventEmitter |
+
+## PARTIAL (14)
+| Module              | What works                                | What's missing                                    |
+|---------------------|-------------------------------------------|---------------------------------------------------|
+| Menu / MenuItem     | buildFromTemplate/append/insert/getMenuItemById, native setApplicationMenu via muda, popup via bridge, _serialize, submenu nesting | Click events from native menu, role-based predefined items |
+| BrowserWindow       | create/show/hide/focus/min/max/close/destroy/setTitle/setSize/loadURL/loadFile | DevTools actually opening, navigation (back/forward), capturePage, print, printToPDF, setPosition, setBounds |
+| WebContents         | loadURL/loadFile/send/executeJavaScript/reload, session stub | Real session, navigation history, DevTools CDP, zoom actually applied |
+| ipcRenderer         | invoke/send/sendSync/on/once/removeListener | Bridge not always wired, sendSync returns undefined |
+| dialog              | showOpenDialog/showSaveDialog/showMessageBox/showErrorBox | Native dialogs not wired (Rust has no dialog commands) |
+| shell               | openExternal/openPath (Node mode)         | moveItemToTrash deletes permanently, shortcut stubs |
+| Notification        | show via browser Notification API          | No native OS notification integration |
+| nativeImage         | createFromPath/Buffer/DataURL, toDataURL, getSize | resize/crop don't transform pixels, toPNG/toJPEG bugs |
+| contextBridge       | exposeInMainWorld with deep freeze          | No real world isolation, no proxy serialization |
+| webContents (utils) | getAllWebContents/getFocusedWebContents    | Minimal                                           |
+| net                 | fetch delegates to globalThis.fetch        | No net.request(), no ClientRequest API             |
+| process (polyfill)  | pid/argv/env/platform/versions/cwd/nextTick | memoryUsage/cpuUsage/uptime/kill missing          |
+| contextIsolation    | webPreferences.contextIsolation stored      | No actual V8 isolate separation                   |
+
+## STUB (12)
+| Module           | Implementation                                              |
+|------------------|-------------------------------------------------------------|
+| Tray             | API surface present, no native system tray                  |
+| safeStorage      | base64 encoding, not real encryption                        |
+| autoUpdater      | API surface for electron-updater compat, no actual updates  |
+| session          | defaultSession + fromPartition stubs, all no-ops            |
+| clipboard        | readText/writeText no-ops                                   |
+| screen           | Hardcoded 1920x1080 primary display                         |
+| systemPreferences| Hardcoded dark mode / accent color                          |
+| powerMonitor     | getSystemIdleState returns 'active', no real monitoring     |
+| globalShortcut   | register always returns true, does nothing                  |
+| updater          | Covered by autoUpdater stub                                 |
+
+## MISSING (9)
+| Module           | Notes                                    |
+|------------------|------------------------------------------|
+| nativeTheme      | No theme detection                       |
+| netLog           | No network log capture                   |
+| protocol         | No custom protocol registration          |
+| crashReporter    | No crash reporting                       |
+| desktopCapturer  | No screen/window capture sources         |
+| pushNotifications| No push notification handling            |
+| utilityProcess   | No utility/forked process                |
+| ShareMenu        | No share menu (macOS)                    |
+| TouchBar         | No Touch Bar (macOS)                     |
+
+## Missing from existing modules
+- BrowserWindow: webContents.debugger, setOpacity/getOpacity, setProgressBar actual display
+- app: render-process-gone, child-process-gone events (require real process monitoring)
+- Menu: native menu click events not wired back to JS, no role-based predefined items (copy/paste/undo etc.)