analysis: add name type resolution

this only adds resolution for the types. for the actual metadata, such
as e.g parameters, that isn't available, so codegen isn't helped by
this.

examples/hello.ry

@@ -43,8 +43,7 @@ fn multwo(num: i32, double_flag: bool) i32 {
 }
 
 fn multwo_with_one(b: i32) i32 {
-    // TODO replace by b
-    return multwo(2, false) + 2;
+    return multwo(b, false) + b;
 }
 
 fn add(a: i32, b: i32) i32 {