✨ feat: add powershell completion for aws cli

dotposh/Config/posh-completions/aws.ps1

@@ -0,0 +1,18 @@
+if (Get-Command aws -ErrorAction SilentlyContinue) {
+	Register-EngineEvent -SourceIdentifier PowerShell.OnIdle -MaxTriggerCount 1 -Action {
+		# https://docs.aws.amazon.com/cli/latest/userguide/cli-configure-completion.html
+		Register-ArgumentCompleter -Native -CommandName aws -ScriptBlock {
+			param($commandName, $wordToComplete, $cursorPosition)
+			$env:COMP_LINE = $wordToComplete
+			if ($env:COMP_LINE.Length -lt $cursorPosition) {
+				$env:COMP_LINE = $env:COMP_LINE + " "
+			}
+			$env:COMP_POINT = $cursorPosition
+			aws_completer.exe | ForEach-Object {
+				[System.Management.Automation.CompletionResult]::new($_, $_, 'ParameterValue', $_)
+			}
+			Remove-Item Env:\COMP_LINE
+			Remove-Item Env:\COMP_POINT
+		}
+	} | Out-Null
+}