Improve desktop script runs with timestamps & logs

Improve script execution in the desktop app by introducing timestamped
filenames and detailed logging. These changes aim to facilitate easier
debugging, auditing and overall better user experience.

Key changes:

- Add timestamps in filenames for temporary files to aid in
  troubleshooting and auditing.
- Add application logging throughout the script execution process to
  enhance troubleshooting capabilities.

Other supporting changes:

- Refactor `TemporaryFileCodeRunner` with subfunctions for improved
  readability, maintenance, reusability and extensibility.
- Refactor unit tests for `TemporaryFileCodeRunner` for improved
  granularity and simplicity.
- Create centralized definition of supported operating systems by
  privacy.sexy to ensure robust and consistent test case creation.
- Simplify the `runCode` method by removing the file extension
  parameter; now handled internally by `FileNameGenerator`.

tests/unit/shared/Stubs/LocationOpsStub.ts

@@ -8,6 +8,8 @@ export class LocationOpsStub
 
   private scenarios = new Map<string, string>();
 
+  private defaultSeparator = `/[${LocationOpsStub.name}]PATH-SEGMENT-SEPARATOR/`;
+
   public withJoinResult(returnValue: string, ...paths: string[]): this {
     this.scenarios.set(LocationOpsStub.getScenarioKey(paths), returnValue);
     return this;
@@ -19,6 +21,11 @@ export class LocationOpsStub
     return this;
   }
 
+  public withDefaultSeparator(defaultSeparator: string): this {
+    this.defaultSeparator = defaultSeparator;
+    return this;
+  }
+
   public combinePaths(...pathSegments: string[]): string {
     this.registerMethodCall({
       methodName: 'combinePaths',
@@ -33,7 +40,7 @@ export class LocationOpsStub
     if (foundScenario) {
       return foundScenario;
     }
-    return pathSegments.join('/PATH-SEGMENT-SEPARATOR/');
+    return pathSegments.join(this.defaultSeparator);
   }
 
   private static getScenarioKey(paths: string[]): string {