Add Tool For Adding EF Migrations (#2576)

* Add Tool For Adding EF Migrations

* Update dev/ef_migrate.ps1

Co-authored-by: Oscar Hinton <Hinton@users.noreply.github.com>

Co-authored-by: Oscar Hinton <Hinton@users.noreply.github.com>

dev/ef_migrate.ps1

@@ -0,0 +1,19 @@
+#!/usr/bin/env pwsh
+param (
+  [Parameter(Mandatory)]
+  $Name
+)
+
+dotnet tool restore
+
+$providers = @{
+    MySql = "../util/MySqlMigrations"
+    Postgres = "../util/PostgresMigrations"
+    Sqlite = "../util/SqliteMigrations"
+}
+
+foreach ($key in $providers.keys) {
+    Write-Output "--- START $key ---"
+    dotnet ef migrations add $Name -s $providers[$key]
+    Write-Output "--- END $key ---"
+}