Cache max size

[ronag]

I think we could probably implement a max size with the sqlite backend by learning from how node impements localstorage with storage limit.

See: https://github.com/nodejs/node/blob/main/src/node_webstorage.cc#L108

[ronag]

@mcollina @metcoder95

[metcoder95]

Default is 10mb, no customizable; so I'm imagining cutomize it with a lower upper bound?

or what do you have in mind exactly?