Invite users to existing rooms (#441)

Invite users to existing rooms

Scope:

- Allow inviting from the room detail screen and the member list
- Invite option is only shown if the user has the correct power level
- Search flow the same as creating a new room, allowing multi-select
- Existing room members/invitees are disabled with a custom caption
- Sending is asynchronous, an error dialog will appear wherever the
  user is if necessary

Closes #245

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

@@ -95,6 +95,7 @@ fun DependencyHandlerScope.allLibrariesImpl() {
 
 fun DependencyHandlerScope.allServicesImpl() {
     implementation(project(":services:analytics:noop"))
+    implementation(project(":services:apperror:impl"))
     implementation(project(":services:appnavstate:impl"))
     implementation(project(":services:toolbox:impl"))
 }