Replace the column options array with an object

As already suggested 2 years ago https://github.com/cakephp/phinx/issues/249#issuecomment-373716784

// suggested backward compatible way, using a factory to create the object
$this->table('some_table')
	->addColumn(Column::text('name')->length(212)->notNull())
	->addColumn(Column::bool('active')->default(false)
	->update();

// even shorter complementary API, use the factory internally and provide methods
$this->table('some_table')
	->addTextColumn('name')->length(212)->notNull()
	->addBoolColumn('active')->default(false)
	->update();

// old way
$this->table('some_table')
	->addColumn('name', 'text', ['length' => 212, 'null' => false])
	->addColumn('active', 'bool', ['default' => false])
	->update();

The first example would require a check inside of the addColumn() method if it's only one arg and if it is of a specific interface (ColumnFactoryInterface?). The second example would not require and backward compatibility change to addColumn() but provide new expressive methods for add a specific column type.

I think we really don't need to have a discussion about the obvious advantages of using an expressive object oriented notation over the fugly arrays. Do we?

Start by reviewing the table() and addColumn() API shown in the issue, along with the earlier discussion in issue #249. Compare the proposed Column factory and typed helper approaches, then determine which backward-compatible object API should replace or complement the current array form. Done means the chosen API is implemented with compatibility behavior and covered by the project's relevant migration tests.