IME // Add expandingTildeInPath to String.

- Also removes the same section from StringUtils.

Source/Modules/ControllerModules/StringUtils.swift

@@ -63,10 +63,6 @@ extension String {
     return string[..<string.index(string.startIndex, offsetBy: fixedIndex)].utf16.count
   }
 
-  public var expandingTildeInPath: String {
-    (self as NSString).expandingTildeInPath
-  }
-
   public func utf16SubString(with range: NSRange) -> String {
     (self as NSString).substring(with: range)
   }

Source/Modules/IMEModules/IME.swift

@@ -355,9 +355,16 @@ extension RangeReplaceableCollection where Element: Hashable {
   }
 }
 
-// MARK: - Error Extension
+// MARK: - String Tildes Expansion Extension
+
+extension String {
+  public var expandingTildeInPath: String {
+    (self as NSString).expandingTildeInPath
+  }
+}
+
+// MARK: - String Localized Error Extension
 
-extension String: Error {}
 extension String: LocalizedError {
   public var errorDescription: String? {
     self