Add Editor Commands for opening Profiles (#254)

* Add Editor Commands for opening Profiles

This change adds the following built-in Editor Commands

- PowerShellEditorServices.OpenEditorProfile: Opens the current
Editor's profile. Uses $profile so should work when other Editors use
PSES.
- PowerShellEditorServices.OpenProfileList: Prompts user with a list of
 Profiles to open.

* Make Current editor default choice

This change makes the is for PowerShellEditorServices.OpenProfileList
Editor Command. It makes the default first selection the current Editor
and filters out any duplicates. Should also account for any new profiles
other Editors might add.

Author: gerane

src/PowerShellEditorServices/Extensions/BuiltInCommands.ps1

@@ -0,0 +1,30 @@
+Register-EditorCommand `
+    -Name 'PowerShellEditorServices.OpenEditorProfile' `
+    -DisplayName 'Open Editor Profile' `
+    -SuppressOutput `
+    -ScriptBlock {
+        param([Microsoft.PowerShell.EditorServices.Extensions.EditorContext]$context)
+        If (!(Test-Path -Path $Profile)) { New-Item -Path $Profile -ItemType File }
+        $psEditor.Workspace.OpenFile($Profile)
+    }
+
+Register-EditorCommand `
+    -Name 'PowerShellEditorServices.OpenProfileList' `
+    -DisplayName 'Open Profile from List (Current User)' `
+    -SuppressOutput `
+    -ScriptBlock {
+        param([Microsoft.PowerShell.EditorServices.Extensions.EditorContext]$context)
+        
+        $Current = Split-Path -Path $profile -Leaf        
+        $List = @($Current,'Microsoft.VSCode_profile.ps1','Microsoft.PowerShell_profile.ps1','Microsoft.PowerShellISE_profile.ps1','Profile.ps1') | Select-Object -Unique
+        $Choices = [System.Management.Automation.Host.ChoiceDescription[]] @($List)
+        $Selection = $host.ui.PromptForChoice('Please Select a Profile', '(Current User)', $choices,'0')
+        $Name = $List[$Selection]
+        
+        $ProfileDir = Split-Path $Profile -Parent
+        $ProfileName = Join-Path -Path $ProfileDir -ChildPath $Name
+        
+        If (!(Test-Path -Path $ProfileName)) { New-Item -Path $ProfileName -ItemType File }
+        
+        $psEditor.Workspace.OpenFile($ProfileName)
+    }