Make Query.Property parameterised with <BT> "Base Type" as Number, String, Temporal, Boolean or Object

These types then determine which functions are valid for the types. So:
- Number functions
- String/varchar functions
- Temporal Date, DateTime, Time functions
- Boolean functions
- Object being everything else

ebean-test/src/test/java/org/tests/query/TestStdFunctions.java

@@ -15,8 +15,7 @@ public class TestStdFunctions {
 
   @Test
   void coalesceLike() {
-    var name = Query.Property.of("name");
-
+    Query.Property<String> name = Query.Property.of("name");
     var query = DB.find(Customer.class)
       .select(coalesce(name, "na").toString())
       .where()