Create a utility method to register jackson modules

[anidotnet]

Write a utility method registerModule in NitriteBuilder to register jackson module while setting up the database.

[anidotnet]

The usage is as follows:

Nitrite db = Nitrite
        .builder()
        .filePath(file)
        .registerModule(new Jdk8Module())        // register jdk8 module
        .registerModule(new JavaTimeModule())    // register java.time module
        .openOrCreate();