There is no such VS extension can force developers to get code from TFS and check in frequently and continuously.
If which you want is to "get the latest " and avoid TFS force you/colleagues to resolve conflicts before checking in.
However, TFS redefined what "Get Latest" does. In TFS terms, Get Latest means get the latest version of the files, but ignore the ones that the server thinks is already in your workspace. Moreover, doing a get latest is good practice, but not mandatory. There is no such settings.
There has been some similar questions in SO and got an amazing answer, below links for your reference:
As a workaround, if you really need this feature in your team, you could set up a reminder such as meeting reminder in outlook 4:00PM to remind your colleagues, they should merge their work in the branch at the end of day. Just couldn't force them to do this.