Feature/onboarding slides (#4955)

# Description of Changes

- Added onboarding slides/upgrade banner conditions for all the
following cases
  - 'licensed'
  - 'no-login-user-under-limit-no-license'
  - 'no-login-admin-under-limit-no-license'
  - 'no-login-user-over-limit-no-license'
  - 'no-login-admin-over-limit-no-license'
  - 'login-user-under-limit-no-license'
  - 'login-admin-under-limit-no-license'
  - 'login-user-over-limit-no-license'
  - 'login-admin-over-limit-no-license';


---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/DeveloperGuide.md#6-testing)
for more details.

---------

Co-authored-by: Anthony Stirling <77850077+Frooodle@users.noreply.github.com>
Co-authored-by: Connor Yoh <connor@stirlingpdf.com>

frontend/src/core/services/preferencesService.ts

@@ -7,8 +7,11 @@ export interface UserPreferences {
   defaultToolPanelMode: ToolPanelMode;
   theme: ThemeMode;
   toolPanelModePromptSeen: boolean;
+  hasSelectedToolPanelMode: boolean;
   showLegacyToolDescriptions: boolean;
   hasCompletedOnboarding: boolean;
+  hasSeenIntroOnboarding: boolean;
+  hasSeenCookieBanner: boolean;
   hideUnavailableTools: boolean;
   hideUnavailableConversions: boolean;
 }
@@ -19,8 +22,11 @@ export const DEFAULT_PREFERENCES: UserPreferences = {
   defaultToolPanelMode: DEFAULT_TOOL_PANEL_MODE,
   theme: getSystemTheme(),
   toolPanelModePromptSeen: false,
+  hasSelectedToolPanelMode: false,
   showLegacyToolDescriptions: false,
   hasCompletedOnboarding: false,
+  hasSeenIntroOnboarding: false,
+  hasSeenCookieBanner: false,
   hideUnavailableTools: false,
   hideUnavailableConversions: false,
 };