settingsPage Init selfhost (#4734)

# Description of Changes

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- Why the change was made
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## 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)

### 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: James Brunton <[email protected]>

app/core/src/main/resources/settings.yml.template

@@ -99,6 +99,7 @@ premium:
 
 mail:
   enabled: false # set to 'true' to enable sending emails
+  enableInvites: false # set to 'true' to enable email invites for user management (requires mail.enabled and security.enableLogin)
   host: smtp.example.com # SMTP server hostname
   port: 587 # SMTP server port
   username: '' # SMTP server username
@@ -171,8 +172,6 @@ system:
     cleanupSystemTemp: false # Whether to clean broader system temp directory
 
 ui:
-  appName: '' # application's visible name
-  homeDescription: '' # short description or tagline shown on the homepage
   appNameNavbar: '' # name displayed on the navigation bar
   languages: [] # If empty, all languages are enabled. To display only German and Polish ["de_DE", "pl_PL"]. British English is always enabled.