feat: enable wco on macOS

[deepak1556]

Starting PR to see if we can unify the use of navigator.windowControlsOverlay across platform.

The traffic lights are controlled similar to titlebarStyle: 'hidden' mode, instead of calling setTitleBarOverlay we adjust the height via setWindowButtonPosition. Color and symbol color does not apply to traffic lights.

[bpasero]

I am searching through our code to understand where we depend on window.*overlay or WCO and I think in each case we need to revisit what this means for macOS:

• vscode/src/vs/workbench/browser/layout.ts

  Line 583 in 013ebea

  useWindowControlsOverlay(this.configurationService) || // not working with WCO (border cannot draw over the overlay)

• vscode/src/vs/workbench/browser/parts/titlebar/titlebarPart.ts

  Line 228 in 013ebea

  const wcoEnabled = isWeb && isWCOEnabled();

• vscode/src/vs/workbench/browser/parts/titlebar/titlebarPart.ts

  Line 231 in 013ebea

  value = Math.max(value, getWCOTitlebarAreaRect(getWindow(this.element))?.height ?? 0);

• vscode/src/vs/workbench/browser/parts/titlebar/titlebarPart.ts

  Lines 492 to 494 in 013ebea

  	if (isWCOEnabled()) {
  	this.windowControlsContainer.classList.add('wco-enabled');
  	}

• vscode/src/vs/workbench/electron-sandbox/parts/titlebar/titlebarPart.ts

  Lines 237 to 238 in 013ebea

  	// WCO styles only supported on Windows currently
  	if (useWindowControlsOverlay(this.configurationService)) {

• vscode/src/vs/workbench/services/layout/browser/layoutService.ts

  Lines 365 to 368 in 013ebea

  	// if WCO is visible, we have to show the title bar
  	if (isWCOEnabled() && !inFullscreen) {
  	return true;
  	}

• vscode/src/main.ts

  Line 137 in 013ebea

  // Windows Control Overlay is rendered correctly on Windows.

• vscode/src/vs/base/browser/browser.ts

  Line 113 in 013ebea

  const standaloneMatchMedia = mainWindow.matchMedia('(display-mode: standalone) or (display-mode: window-controls-overlay)');

• vscode/src/vs/workbench/browser/layout.ts

  Line 583 in 013ebea

  useWindowControlsOverlay(this.configurationService) || // not working with WCO (border cannot draw over the overlay)

• vscode/src/vs/workbench/electron-sandbox/parts/titlebar/titlebarPart.ts

  Line 238 in 013ebea

  if (useWindowControlsOverlay(this.configurationService)) {