Postgres RLS + permission controlled database managers (#33)

This PR adds Postgres RLS (trait manager + table manager approach) and permission controlled managers for PostgreSQL.

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Co-authored-by: lukinovec <lukinovec@gmail.com>
Co-authored-by: PHP CS Fixer <phpcsfixer@example.com>

src/TenancyServiceProvider.php

@@ -94,6 +94,7 @@ class TenancyServiceProvider extends ServiceProvider
             Commands\MigrateFresh::class,
             Commands\ClearPendingTenants::class,
             Commands\CreatePendingTenants::class,
+            Commands\CreateUserWithRLSPolicies::class,
         ]);
 
         $this->app->extend(FreshCommand::class, function ($_, $app) {