Add PS Install script

Install.ps1

@@ -0,0 +1,14 @@
+$object = Invoke-WebRequest -Uri "https://gitea.cebotari.ru/api/v1/repos/chebser/RhSolutions-AddIn/releases/latest" | ConvertFrom-Json 
+$download_link = $object.assets[1].browser_download_url
+Invoke-WebRequest -Uri $download_link -OutFile "$env:appdata\Microsoft\AddIns\RhSolutions-AddIn-packed.xll"
+
+$excel = New-Object -ComObject Excel.Application
+foreach ($addin in $excel.AddIns2)
+{
+    $title = $addin.Title
+    if ($title -eq 'RhSolutions Add-In')
+    {
+        $addin.Installed = $true
+    }
+}
+$excel.Quit()