Declared session in BaseController to avoid Creation of dynamic property in php 8.2

[ghost]

Declared session property in the BaseController to avoid the depreciation of dynamic properties in PHP 8.2

[samsonasik]

I prefer to just write comment instead, as session may or may not be used, session init is also commented under init method.

[ddevsr]

Suggested change

	* To declare the session propety to allow for global
	* To declare the session property to allow for global

[samsonasik]

protected modifier is fine since the code is commented

[kenjis]

It should be protected, because we don't need to set it public.

[MGatner]

I appreciate the thoroughness but I'm fine expecting developers to handle this themselves. A compromise might be expanding the comment below under initController to say something like "be sure to declare properties for anything you assign."

[ghost]

Cleaned up the comment regarding the depreciation of dynamic properties and set the session method to be protected in the BaseController

[kenjis]

@thenerdyshark We do not use git merge. Please use git rebase to update your branch.
See https://github.com/codeigniter4/CodeIgniter4/blob/develop/contributing/workflow.md#updating-your-branch

[datamweb]

Thanks!