naming fixes

Author: sliemeobn

Sources/ReactivityMacros/ReactivityMacros.swift

@@ -1,4 +1,4 @@
-// original name: ReactiveMacros.swift
+// original name: ObservableMacros.swift
 // adjusted and renamed to match reactivity module
 
 //===----------------------------------------------------------------------===//
@@ -187,15 +187,15 @@ extension ReactiveMacro: MemberMacro {
 
         if declaration.isEnum {
             // enumerations cannot store properties
-            throw DiagnosticsError(syntax: node, message: "'@Observable' cannot be applied to enumeration type '\(observableType.text)'", id: .invalidApplication)
+            throw DiagnosticsError(syntax: node, message: "'@Reactive' cannot be applied to enumeration type '\(observableType.text)'", id: .invalidApplication)
         }
         if declaration.isStruct {
             // structs are not yet supported; copying/mutation semantics tbd
-            throw DiagnosticsError(syntax: node, message: "'@Observable' cannot be applied to struct type '\(observableType.text)'", id: .invalidApplication)
+            throw DiagnosticsError(syntax: node, message: "'@Reactive' cannot be applied to struct type '\(observableType.text)'", id: .invalidApplication)
         }
         if declaration.isActor {
             // actors cannot yet be supported for their isolation
-            throw DiagnosticsError(syntax: node, message: "'@Observable' cannot be applied to actor type '\(observableType.text)'", id: .invalidApplication)
+            throw DiagnosticsError(syntax: node, message: "'@Reactive' cannot be applied to actor type '\(observableType.text)'", id: .invalidApplication)
         }
 
         var declarations = [DeclSyntax]()