Open Renoise’s Preferences from the Edit menu (or Ctrl + Comma) and go to the MIDI section. You should be able to choose your Trigger Finger there as the master controller.
You can also set things up on a per-instrument level from each instrument’s MIDI tab.
Please note: We do not have any special support for the Trigger Finger (nor any other specific MIDI controller for that matter), but all standard plug-and-play MIDI functionality should work just fine, such as triggering notes, transport messages, CC, etc.
For more specialised support of the TFP, it may be possible to use a tool such as Duplex, provided that someone can create the appropriate mapping/config to support it.