Support Custom InitialSessionState

[michaeltlombardi]

Use Case

As a developer leveraging the PowerShell Manager, I want to be able to preload the manager's Session State with needed options, such as (but not limited to):

• Session Configuration
• Module Import
• Variables
• Execution Policy
• Language Mode
• Startup Scripts
• Transcript Directory
• Command allow list

Describe the Solution You Would Like

Extension of the options hash for the Pwsh::Manager which allow users to specify InitialSessionState overrides from default which are implemented in the init.ps1 template file.

Something like:

options = {
  initial_session_state: {
    execution_policy: 'Unrestricted',
    import_psmodules_from_path: ['C:\path\to\foo.psd1', 'C:\path\to\bar.psd1'],
    session_configuration_file_path: 'C:\path\to\configuration.pssc'
  },
}

With a set list of supported surfaces, documentation, and testing.