Add cargo features for modules

[hu55a1n1]

Description

Add features to enable conditional compilation for modules (eg. auth, staking, ibc, bank). This would allow apps using the framework to choose which modules to enable/install. In the future, there could be multiple implementations of the same module.

Acceptance criteria

Every module must have an associated feature and dependencies should be handled properly. Users must be able to opt-in to their modules of choice.