Add Basic Cognitive Tests to aRMT

[afolarin]

Native cognitive testing provided in aRMT app could be useful and simplify basic cognitive testing for users. e.g. Simple Reaction Speed, Memory and Stroop Test etc.
This is a top level issue placeholder for adding linked issues to track different basic cognitive tests we are considering adding natively to aRMT.

• Stroop Test (could be a adaptation of the existing Speech Test for example, or some variation that doesn't require audio processing e.g. clicking on the buttons of corresponding colour)
• Reaction Speed (options TBD) we already run timing functions on questionnaire answers, would be relatively easy to adapt this.
• Working Memory (options TBD) e.g. recall a list of words shown in sequence something like the MONTREAL COGNITIVE ASSESSMENT for example
• - [ ] Decision Making (options TBD)
• Executive Function (options TBD)

[yatharthranjan]

Good idea with one caveat being that response times with latencies of even ms might not be feasible in some cases, which is very much the case with cross-platform frameworks. We should do some tests and check the feasibility of this first.