Improve `QueryInterface::withTypecasting()` method

[Tigrov]

Proposed new feature or change

• to avoid additional database queries to obtain column information for type casting;
• to be able to specify a custom type for columns for type casting.

A possible solution is to add ability to specify types for casting directly for each column in query results:

$query->withTypecasting([
    '*' => true, // automatically typecast all columns using `PDOStatement::getColumnMeta()`
    'name' => ColumnType::STRING, // abstract type
    'age' => 'int', // database type
    'birthday' => false, // do not typecast
    'is_active' => new BooleanColumn(),
    'created_at' => new DateTimeColumn(),
]);

The types can be presented as

• instances of ColumnInterface;
• string names of types (e.g. int, char(20), json, etc);
• true to automatically detect type using PDOStatement::getColumnMeta();
• empty value (null, false or '') which means without typecasting.

Also possible to use * as a column name to specify default type for all columns.