Enable WYSIWYG plain text support

RiotSwiftUI/Modules/Room/Composer/ViewModel/ComposerViewModel.swift

@@ -35,6 +35,15 @@ final class ComposerViewModel: ComposerViewModelType, ComposerViewModelProtocol
             state.sendMode = newValue
         }
     }
+
+    var textFormattingEnabled: Bool {
+        get {
+            state.textFormattingEnabled
+        }
+        set {
+            state.textFormattingEnabled = newValue
+        }
+    }
     
     var eventSenderDisplayName: String? {
         get {

RiotSwiftUI/Modules/Room/Composer/ViewModel/ComposerViewModelProtocol.swift

@@ -20,6 +20,7 @@ protocol ComposerViewModelProtocol {
     var context: ComposerViewModelType.Context { get }
     var callback: ((ComposerViewModelResult) -> Void)? { get set }
     var sendMode: ComposerSendMode { get set }
+    var textFormattingEnabled: Bool { get set }
     var eventSenderDisplayName: String? { get set }
     var placeholder: String? { get set }
 }