Introduce parameter positions and "repeat" annotations

Introduce a {{@Pos(

)}} annotation that allows repeating and positional adjustment of a parameter This would allow for things like this:

@LogMessage(level = DEBUG)
@Message(value = "Got a %d (%x)")
void gotNumber(@Pos({1, 2}) int value);

Unqualified parameters start counting from the position of the previous parameter. If two parameters end up in the same position it's an error; if a position has no parameter that's an error as well.

Positional parameters should allow for multiple transformations too:

@LogMessage(level = DEBUG)
@Message(value = "Got a %s with a type of %s which has a hash code of %x")
void gotThing(@Pos(value = {1, 2, 3}, transform = {{}, {GET_CLASS}, {GET_CLASS, HASH_CODE}) Object thing);