Move typing display to qml

CMakeLists.txt

resources/langs/nheko_de.ts

resources/langs/nheko_el.ts

resources/langs/nheko_en.ts

resources/langs/nheko_fi.ts

resources/langs/nheko_fr.ts

resources/langs/nheko_nl.ts

resources/langs/nheko_pl.ts

resources/langs/nheko_ru.ts

resources/langs/nheko_zh_CN.ts

resources/qml/TimelineView.qml

src/ChatPage.cpp

src/ChatPage.h

src/TypingDisplay.cpp

src/TypingDisplay.h

src/timeline/TimelineModel.cpp

src/timeline/TimelineModel.h

src/timeline/TimelineViewManager.cpp