Feature: add ability to store eloquent casts as an encrypted string

[eugen-stranz]

Similar to Laravel's ability to store encrypted strings by providing a cast this enhancement allows the storage of data objects / collections as an encrypted string.

It works by appending the ":encrypted" key to the cast within the eloquent model on the specific column

for example:

Both columns "data" and "secrets" store the same data object.

[rubenvanassche]

Could you add some tests to this feature so that it wouldn't be removed by accident?

[rubenvanassche]

And some docs so everyone can use this feature!

[eugen-stranz]

Hello @rubenvanassche

I will provide the missing parts this week.

Thank you for your feedback.