Add: Functionality to call session manager from bls.

1. Add: session manager store to v2. Users can access and manipulate sessions with provided APIs.
2. Fix: Redis cache returns gjson.Result{} as a response to Get(). Changed it to string.
3. Add: Detect cache type at runtime with Type().

Closes MKCLOS/coreosv3/corestudio#315

MKCLOS/coreosv3/corestudio#290

changed the description

mentioned in commit 979fe08f

merged