[NEW] Threads (#13541)

.gitignore

.meteor/packages

.meteor/versions

.vscode/launch.json

client/routes/roomRoute.js

package.json

...s/assistify-threading/client/createThreadMessageAction.js

packages/assistify-threading/client/index.js

...istify-threading/client/lib/messageTypes/threadMessage.js

packages/assistify-threading/client/lib/threadsOfRoom.js

...sistify-threading/client/public/stylesheets/threading.css

packages/assistify-threading/client/tabBar.js

packages/assistify-threading/client/threadFromMessageBox.js

packages/assistify-threading/client/views/ThreadList.html

packages/assistify-threading/client/views/ThreadList.js

packages/assistify-threading/client/views/ThreadsTabbar.html

packages/assistify-threading/client/views/ThreadsTabbar.js

...y-threading/client/views/creationDialog/CreateThread.html

...ify-threading/client/views/creationDialog/CreateThread.js

...threading/client/views/fieldTypeThreadLastMessageAge.html