Tools
Twitch-Resolve Marker Converter
Starting timestamp will be 01:00:00:00.
This tool helps convert your twitch markers into EDL - a format used by Davinci Resolve for markers, amongst other things.
First, you'll need to download your markers from Twitch - they should be in the CSV format. Then, upload that file here, and the tool will process it into an EDL file that can be downloaded.
Note: This format is specifically for Resolve only. It will not work for other editors, as different editors use different flavours of EDL.
If you need more details, I made a video to help explain how to use the tool.
For a more technical look, here is an article about the code I used -- including some source code at the end.