Security and privacy part 2 (#3637)

* handling the history visibility flag

* better logic to handle visibility

* better handling of the visibility options state

* added some copies, and the public room directory

visibility state

* completed the UI

added also the preview tests

* improved the handling of the directory visibility

* added the space users case

and improved handling of the access -> vsibility reaction. Also added a simple error handling for the public directory toggle

* added the edit room address view

but is missing its full implementation

* implement the UI for the edit room address screen

* implemented error checking

when editing the address

* updated preview tests and improved code

* typo fix

* Fix various issues after rebasing.

* Fix build errors and broken snapshot tests

* Adopt latest room privacy and canonical alias setting APIs

* Add support for creating and editing the room's alias.

* Add support for saving room privacy setting changes.

* Fix room alias screen snapshot tests following recent changes.

---------

Co-authored-by: Stefan Ceriu <stefanc@matrix.org>

ElementX/Sources/Other/Extensions/String.swift

@@ -97,3 +97,13 @@ extension String {
         trimmingCharacters(in: .whitespacesAndNewlines).isEmpty
     }
 }
+
+extension String {
+    static func makeCanonicalAlias(aliasLocalPart: Self?, serverName: Self?) -> Self? {
+        guard let aliasLocalPart, !aliasLocalPart.isEmpty,
+              let serverName, !serverName.isEmpty else {
+            return nil
+        }
+        return "#\(aliasLocalPart):\(serverName)"
+    }
+}