Adds new Theme API functions

[johannesconsulting]

Description

Adds 2 new functions that are related to the new APIs introduced with 14.4

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that makes existing functionality work differently)
• Documentation update (psPAS website or command help content)
• Other (see description)

How Has This Been Tested?

• Pester test(s) update required
• Pester test(s) updated
• Pester test(s) passing

Test Configuration:

• PowerShell version: 7
• CyberArk PAS version: 14.4
• OS Version: Windows Server 2022

Checklist:

• My code follows the style guidelines of this project
• I have followed the contributing guidelines.
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new test failures or errors
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have opened & linked a related issue
• I have linked a related issue

[pspete]

Thank you @johannesconsulting !