Inlined Timestamp in bubble style for messages that have a bubble (#947)

* web-like solution

* not super polished but working implementation

* polishing the spacing and sizes

* removing unused code

* code improvements

* adding a test case in the preview for RTL

* addressing some PR comments

* added some tests and polished the code

* better naming

* code improvement

* RTL fix

* Revert "RTL fix"

This reverts commit 14e4468a5358769daa57891f4991e9e32da1c985.

* better RTL fix

* updated UI tests

* separated some files

* addressed some PR comments

* some more tests

ElementX/Sources/Other/Extensions/String.swift

@@ -62,3 +62,22 @@ extension String {
         return mutableString.trimmingCharacters(in: .whitespaces)
     }
 }
+
+extension String {
+    static func generateBreakableWhitespaceEnd(whitespaceCount: Int, isRTL: Bool) -> String {
+        guard whitespaceCount > 0 else {
+            return ""
+        }
+
+        var whiteSpaces = ""
+        if isRTL {
+            whiteSpaces = "\u{202e}"
+        }
+
+        // fixed size whitespace of size 1/3 em per character
+        whiteSpaces += String(repeating: "\u{2004}", count: whitespaceCount)
+
+        // braille whitespace, which is non breakable but makes previous whitespaces breakable
+        return whiteSpaces + "\u{2800}"
+    }
+}