Allow using / as the path separator

[bytemain]

Describe the feature

Before I found this library, I am using / as the key separator.

and now I want to use this library in my codebase, but Storage always construct key as a:b:c

Additional information

• Would you be willing to help implement this feature?

[bytemain]

This is not easy, and it will be a breaking change for all.

and there also are functions that already in used.

[pi0]

That's correct. What i plan is to support encodeKey utilities to allow this characters.

[bytemain]

I made my first implementation for this, I will make a pr later

[pi0]

Moving to #437