ENH: Add help button to standalone routines

[TEParsons]

[codecov[bot]]

Codecov Report

Merging #5096 (61157f3) into dev (68ea843) will increase coverage by 0.00%. The diff coverage is 33.33%.

@@           Coverage Diff           @@
##              dev    #5096   +/-   ##
=======================================
  Coverage   38.21%   38.21%           
=======================================
  Files         311      311           
  Lines       62502    62512   +10     
  Branches    10904    10904           
=======================================
+ Hits        23884    23890    +6     
- Misses      36556    36561    +5     
+ Partials     2062     2061    -1     

Impacted Files	Coverage Δ
psychopy/app/builder/builder.py	10.38% <11.11%> (+0.01%)	:arrow_up:
psychopy/experiment/routines/_base.py	82.60% <100.00%> (+0.04%)	:arrow_up:
...periment/routines/eyetracker_calibrate/__init__.py	91.89% <100.00%> (+0.11%)	:arrow_up:
...xperiment/routines/eyetracker_validate/__init__.py	89.01% <100.00%> (+0.12%)	:arrow_up:
psychopy/visual/textbox2/textbox2.py	77.12% <0.00%> (+0.23%)	:arrow_up:

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