Simplified type queries

**Is your feature request related to a problem? Please describe.**
When trying to search for objects of a specific type you have to build a query to target the "type" field.

**Describe the solution you'd like**
Simplify Type query creation by adding a function like: Query.forType(MyClass.class).build();

No files or tests are named. Start at the existing Query API and the code that builds queries targeting the "type" field; compare its current construction with the requested Query.forType(MyClass.class).build() entry point. Done means callers can create a type query through that API and the resulting query is covered by tests.

Written by the indexing model from the issue text.