Add .vscode PowerShell code formatting settings

[Badgerati]

Describe the Change

The same settings as Badgerati/Pode#1169 should be used.

To help enforce the code formatting for Pode, specifically just the PowerShell scripts, a workspace settings for PowerShell code formatting should be created under a root .vscode folder.

• This should mostly follow the style guide where possible, and the style guide updated where the settings can't match - such as bracers on new lines for functions and same line for statements, this had to all be on the same line.
• The formatting should trigger on saving only, not while typing.
• All main src PowerShell files should be re-formatted - this just overs files in /src, nothing else. Others will just happen over time.
• The settings should be committed for others to utilise.