Engine: Storage

[one-aalam]

• Add a unified interface for all sorts of key-value stores
• Add a in-memory session store, to demonstrate the interface and support basic in memory storage

Implementation Details

Add abstract class BunStorageEngine and extension BunSessionStorageEngine. As a basic implementation BunInMemorySessionStorageEngine to maintain data in memory.

BunStorageEngine(Abstract Class) -> BunSessionStorageEngine(Implementation Class) -> BunInMemorySessionStorageEngine (Extension of Implementation Class)