[Message actions] New UI for message composer and editing (#526)

* Add UI for edit composer mode

* Remove leftover code from the RTE implementation

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Co-authored-by: ElementBot <benoitm+elementbot@element.io>

plugins/src/main/kotlin/extension/DependencyHandleScope.kt

@@ -98,6 +98,7 @@ fun DependencyHandlerScope.allLibrariesImpl() {
     implementation(project(":libraries:mediapickers:impl"))
     implementation(project(":libraries:mediaupload:impl"))
     implementation(project(":libraries:usersearch:impl"))
+    implementation(project(":libraries:textcomposer"))
 }
 
 fun DependencyHandlerScope.allServicesImpl() {