Add initial go at user created databases for servers, still needs cleaning

app/Exceptions/Service/Database/DatabaseClientFeatureNotEnabledException.php

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+<?php
+
+namespace Pterodactyl\Exceptions\Service\Database;
+
+use Pterodactyl\Exceptions\PterodactylException;
+
+class DatabaseClientFeatureNotEnabledException extends PterodactylException
+{
+    public function __construct()
+    {
+        parent::__construct('Client database creation is not enabled in this Panel.');
+    }
+}

app/Exceptions/Service/Database/NoSuitableDatabaseHostException.php

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+<?php
+
+namespace Pterodactyl\Exceptions\Service\Database;
+
+use Pterodactyl\Exceptions\DisplayException;
+
+class NoSuitableDatabaseHostException extends DisplayException
+{
+    /**
+     * NoSuitableDatabaseHostException constructor.
+     */
+    public function __construct()
+    {
+        parent::__construct('No database host was found that meets the requirements for this server.');
+    }
+}

app/Exceptions/Service/Database/TooManyDatabasesException.php

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+<?php
+
+namespace Pterodactyl\Exceptions\Service\Database;
+
+use Pterodactyl\Exceptions\DisplayException;
+
+class TooManyDatabasesException extends DisplayException
+{
+    public function __construct()
+    {
+        parent::__construct('Operation aborted: creating a new database would put this server over the defined limit.');
+    }
+}