fix: regress hipo::bank::get to hipo::bank::get[TYPE]

[c-dilks]

Since gavalian/hipo#29 was reverted, we are forced to regress some usability here.

Instead of using upstream type inference via

bank.get(...)

we must use one of

bank.getInt(...)
bank.getFloat(...)
// etc.

and know the data types at compile time (though the correct type is only verified upstream at runtime).

[c-dilks]

At least this is the more optimized approach.