Fix OS switching not working on tree view UI

This commit resolves a rendering bug in the tree view component.
Previously, updating the tree collection prior to node updates led to
rendering errors due to the presence of non-existent nodes in the new
collection.

Changes:

- Implement manual control over the rendering process in tree view. This
  includes clearing the rendering queue and currently rendered nodes
  before updates, aligning the rendering process with the updated
  collection.
- Add Cypress E2E tests to test switching between all operating systems
  and script views, ensuring no uncaught errors and preventing
  regression.
- Replace hardcoded operating system lists in the download URL list view
  with a unified `getSupportedOsList()` method from the application,
  reducing duplication and simplifying future updates.
- Rename `initial-nodes` to `nodes` in `TreeView.vue` to reflect their
  mutable nature.
- Centralize the function for getting operating system names into
  `OperatingSystemNames.ts`, improving reusability in E2E tests.

tests/integration/presentation/components/Scripts/View/Tree/Shared/OperatingSystemNames.spec.ts

@@ -0,0 +1,24 @@
+import {
+  describe, it, expect,
+} from 'vitest';
+import { ApplicationFactory } from '@/application/ApplicationFactory';
+import { getOperatingSystemDisplayName } from '@/presentation/components/Shared/OperatingSystemNames';
+import { OperatingSystem } from '@/domain/OperatingSystem';
+
+describe('OperatingSystemNames', () => {
+  describe('getOperatingSystemDisplayName', () => {
+    describe('retrieving display names for supported operating systems', async () => {
+      // arrange
+      const application = await ApplicationFactory.Current.getApp();
+      const supportedOperatingSystems = application.getSupportedOsList();
+      supportedOperatingSystems.forEach((supportedOperatingSystem) => {
+        it(`should return a non-empty name for ${OperatingSystem[supportedOperatingSystem]}`, () => {
+          // act
+          const displayName = getOperatingSystemDisplayName(supportedOperatingSystem);
+          // assert
+          expect(displayName).to.have.length.greaterThanOrEqual(1);
+        });
+      });
+    });
+  });
+});