Show native save dialogs in desktop app #50, #264

This commit introduces native operating system file dialogs in the
desktop application replacing the existing web-based dialogs.

It lays the foundation for future enhancements such as:

- Providing error messages when saving or executing files, addressing
  #264.
- Creating system restore points, addressing #50.

Documentation updates:

- Update `desktop-vs-web-features.md` with added functionality.
- Update `README.md` with security feature highlights.
- Update home page documentation to emphasize security features.

Other supporting changes include:

- Integrate IPC communication channels for secure Electron dialog API
  interactions.
- Refactor `IpcRegistration` for more type-safety and simplicity.
- Introduce a Vue hook to encapsulate dialog functionality.
- Improve errors during IPC registration for easier troubleshooting.
- Move `ClientLoggerFactory` for consistency in hooks organization and
  remove `LoggerFactory` interface for simplicity.
- Add tests for the save file dialog in the browser context.
- Add `Blob` polyfill in tests to compensate for the missing
  `blob.text()` function in `jsdom` (see jsdom/jsdom#2555).

Improve environment detection logic:

- Treat test environment as browser environments to correctly activate
  features based on the environment. This resolves issues where the
  environment is misidentified as desktop, but Electron preloader APIs
  are missing.
- Rename `isDesktop` environment identification variable to
  `isRunningAsDesktopApplication` for better clarity and to avoid
  confusion with desktop environments in web/browser/test environments.
- Simplify `BrowserRuntimeEnvironment` to consistently detect
  non-desktop application environments.
- Improve environment detection for Electron main process
  (electron/electron#2288).

tests/unit/shared/Stubs/WindowVariablesStub.ts

@@ -2,25 +2,34 @@ import { OperatingSystem } from '@/domain/OperatingSystem';
 import { Logger } from '@/application/Common/Log/Logger';
 import { WindowVariables } from '@/infrastructure/WindowVariables/WindowVariables';
 import { CodeRunner } from '@/application/CodeRunner/CodeRunner';
+import { Dialog } from '@/presentation/common/Dialog';
 import { LoggerStub } from './LoggerStub';
 import { CodeRunnerStub } from './CodeRunnerStub';
+import { DialogStub } from './DialogStub';
 
 export class WindowVariablesStub implements WindowVariables {
   public codeRunner?: CodeRunner = new CodeRunnerStub();
 
-  public isDesktop = false;
+  public isRunningAsDesktopApplication: true | undefined = true;
 
   public os?: OperatingSystem = OperatingSystem.BlackBerryOS;
 
-  public log: Logger = new LoggerStub();
+  public log?: Logger = new LoggerStub();
+
+  public dialog?: Dialog = new DialogStub();
 
   public withLog(log: Logger): this {
     this.log = log;
     return this;
   }
 
-  public withIsDesktop(value: boolean): this {
-    this.isDesktop = value;
+  public withDialog(dialog: Dialog): this {
+    this.dialog = dialog;
+    return this;
+  }
+
+  public withIsRunningAsDesktopApplication(isRunningAsDesktopApplication: true | undefined): this {
+    this.isRunningAsDesktopApplication = isRunningAsDesktopApplication;
     return this;
   }