Expose wt arguments in Start-Aish

[StevenBucher98]

Summary of the new feature / enhancement

It would be nice to have a parameter for Start-Aish that allows me to pass configuration values for the wt command so change the pane. Meaning I could configure the size, color and title of the pane.

Proposed technical implementation details (optional)

Start-Aish -WTConfig @{ tabColor = 'blue'; size = '0.5'}

We can maybe choose a better name for the parameter but the idea is there.

[StevenBucher98]

Will have to take into consideration with multiple terminal support. Perhaps in the config file is the best place to do it for aish

[daxian-dbw]

Note that this -WTConfig parameter will not be available on macOS, meaning it's not cross-plat.