Feature migrations up/down (#270)

* Migrations up down

* Add forum model

* Syntactic sugar for db structure changes

* Refactor migrations with $up & $down

* Fix migrations upgrade and downgrade

+ Add option to disable auto migrate

* Add migrate:to command

Usage: php aac migrate:to x (x - database version)

* Show error when mail is not enabled

* Fixes regarding to init.php

* Add migrate command to manually upgrade db, incase auto migrate is disabled

* Fixed rest of the migrations

* Limit max version of database

* Don't allow minus number

* Option to clear specified plugin settings by name

* Version is required

* Fix PHPStan errors

* Unset $up after migration, to prevent executing same migration twice

* Add database version to output

* This is not needed

* Update 5.php

* Set database_auto_migrate on install

* Set blank & color only if current db version supports it

* Fix duplicate function declaration

system/migrations/32.php

@@ -1,4 +1,14 @@
 <?php
+/**
+ * @var OTS_DB_MySQL $db
+ */
+
 // Increase size of page in myaac_visitors table
 
-$db->exec('ALTER TABLE `' . TABLE_PREFIX . "visitors` MODIFY `page` VARCHAR(2048) NOT NULL;");
+$up = function () use ($db) {
+	$db->modifyColumn(TABLE_PREFIX . 'visitors', 'page', 'VARCHAR(2048) NOT NULL');
+};
+
+$down = function () {
+	// nothing to be done, as we have just extended the size of a column
+};