Disk brake and wheel is moving: is my fork too long?
The front wheel (of wheel set you linked to) has a 12x100 mm front axle (road thru-axle) but comes with an adaptor for 9x100 quick release axle, and the fork is made for 9x100 quick release axles. Did you install the adaptor kit correctly on the front wheel hub?
If you grab the front wheel by the tire close to the top of the fork and push/pull the wheel from side to side, do you notice the wheel moving at the quick release?
If it moves, there must be something wrong with how the quick release holds the wheel to the fork. Do the end of the axle of the wheel hub protrude out of the fork so the quick release can't make correct contact with the fork?
Minor notice:
The brake disc and brake caliper is not 100% compatible. The RT70 disk is ment for calipers using narrower brake pads, and the MT 200 uses wider brake pads. This means the brake pads is slightly larger than the brake area of the discs, but I'm not sure what the actual consequences will be in this case. Shimano has a document that state compatibility of their products:
https://productinfo.shimano.com/download/pdf/com/2.6/en