Add a public Observable alias to overcome Xcode 15 bug

Author: freak4pc

Source/RxCocoa/not+RxCocoa.swift

@@ -7,6 +7,7 @@
 //
 
 import RxCocoa
+import RxSwift
 
 extension SharedSequenceConvertibleType where Element == Bool {
     /// Boolean not operator.

Source/Tools/Observable+Alias.swift

@@ -0,0 +1,10 @@
+//
+//  File.swift
+//  
+//
+//  Created by Shai Mishali on 23/08/2023.
+//
+
+import RxSwift
+
+public typealias Observable = RxSwift.Observable