Quality‑of‑Life Updates to PowerShell Profile and Setup Script

[jogotcha]

This pull request introduces some small improvements

PowerShell Profile Improvements:

• Updated the admin function in Microsoft.PowerShell_profile.ps1 to launch new administrator terminals in the current working directory, providing a more intuitive user experience.
• Changed the way the custom script CTTcustom.ps1 is sourced to use dot-sourcing with Join-Path, ensuring the script is loaded in the current session and improving reliability.
• Fixes 'Ep' 'Edit-profile' 'edit' uses vim instead of Editor Override #179

Setup Script Enhancement:

• In setup.ps1, added logic to load the System.Drawing assembly and check installed font families, making the font verification step more robust before confirming setup completion.