pwsh install script admin & version check

bin/install.ps1

@@ -0,0 +1,19 @@
+#!/usr/bin/pwsh
+
+# check administration role
+$currentPrincipal = New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent())
+$bool_admin = $currentPrincipal.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)
+if (!$bool_admin) {
+  Write-Warning -Message "require Admin privilage
+  please run as Administrator"
+  exit 1
+}
+
+# check pwsh version
+# ≧ 7
+if ($PSVersionTable.PSVersion.Major -lt 7) {
+  Write-Warning -Message "pwsh version must be greater than 7
+  please install powershell 7 (Core)
+  you can install via winget"
+  exit 1
+}