docs(js_semantic): update docs and comments

[Conaclos]

Summary

Update outdated comments and docs.

[github-actions]

Parser conformance results on

js/262

Test result	main count	This PR count	Difference
Total	48314	48314	0
Passed	47117	47117	0
Failed	1197	1197	0
Panics	0	0	0
Coverage	97.52%	97.52%	0.00%

jsx/babel

Test result	main count	This PR count	Difference
Total	40	40	0
Passed	37	37	0
Failed	3	3	0
Panics	0	0	0
Coverage	92.50%	92.50%	0.00%

symbols/microsoft

Test result	main count	This PR count	Difference
Total	6546	6546	0
Passed	2201	2201	0
Failed	4345	4345	0
Panics	0	0	0
Coverage	33.62%	33.62%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	669	669	0
Passed	597	597	0
Failed	72	72	0
Panics	0	0	0
Coverage	89.24%	89.24%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	18264	18264	0
Passed	14000	14000	0
Failed	4264	4264	0
Panics	0	0	0
Coverage	76.65%	76.65%	0.00%