RFC: Client database

[geaaru]

For trace installed/available packages we need a system from client side. The idea is to use a NoSQL/K-V database. Here, the possibilities are:

• [x] BoltDB (Few maintained)

• [ ] DGraph

• [ ] Badger

[mudler]

We currently have a persistence implementation in Bolt (https://github.com/mudler/luet/blob/master/pkg/package/database_boltdb.go) , and one in-memory ( https://github.com/mudler/luet/blob/master/pkg/package/database_mem.go)