feat: Move to class based projections

[abhvsn]

Description

PR to add support for class-based projection.
Method signature:

public <P> List<P> all(Class<P> projectionClass) {
        return repo.queryAllExecute(this, projectionClass);
    }

public <P> Optional<P> one(Class<P> projectionClass) {
        return repo.queryOneExecute(this, projectionClass);
    }

Todos:

1. This change can work with top-level fields only

e.g. class EntityClass {
	String id;
	String topLevelField;
	NestedObject nestedObject;
}

class NestedObject {
	String field1;
}

With this setup we can project `nestedObject` but not `nestedobject.field1`

We expect to move to separate tables for the JSONB columns going forward hence not putting efforts here.