fix(ios): fix URL resolution when external frameworks are loaded

Author: daniellacosse

ios/Capacitor/Capacitor/Router.swift

@@ -17,7 +17,7 @@ public struct CapacitorRouter: Router {
     public init() {}
     public var basePath: String = ""
     public func route(for path: String) -> String {
-        let pathUrl = URL(fileURLWithPath: path)
+        let pathUrl = URL(fileURLWithPath: basePath + path)
 
         // If there's no path extension it also means the path is empty or a SPA route
         if pathUrl.pathExtension.isEmpty {