insertOrUpdate, insertOrSkip table methods

[yurii-zadryhun]

These methods would be so useful.

1. insertOrUpdate( $insertion, $update ): Inserts a record with the $insertion values or, if it exists, updates the record with the $update values.
   Please have a look at Laravel's Eloquent implementation of the updateOrInsert method.
   I bet it does something like this
   INSERT INTO {$this->table_name} ( user_id, points ) VALUES( %d, %d ) ON DUPLICATE KEY UPDATE points = points + %d

2. insertOrSkip( $insertion ): Inserts a record with the $insertion values only if the item doesn't exist. Simple insert() throws the MySQL error (duplicate entry). The implementation is simple: INSERT IGNORE INTO instead of INSERT INTO

Maybe you would also add this method
3. forceInsert( $insertion ): Inserts a record after deleting it if it already exists.
https://dev.mysql.com/doc/refman/8.0/en/replace.html