feat(rome_js_analyze): implement useHeadingContent and refactor useAnchorContent

[nissy-dev]

Summary

Fix #3943

Test Plan

Changelog

• The PR requires a changelog line

Documentation

• The PR requires documentation
• I will create a new PR to update the documentation

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[github-actions]

Parser conformance results on ubuntu-latest

js/262

Test result	main count	This PR count	Difference
Total	48863	48863	0
Passed	47796	47796	0
Failed	1067	1067	0
Panics	0	0	0
Coverage	97.82%	97.82%	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	6212	6212	0
Passed	1763	1763	0
Failed	4449	4449	0
Panics	0	0	0
Coverage	28.38%	28.38%	0.00%

ts/babel

Test result	main count	This PR count	Difference
Total	639	639	0
Passed	573	573	0
Failed	66	66	0
Panics	0	0	0
Coverage	89.67%	89.67%	0.00%

ts/microsoft

Test result	main count	This PR count	Difference
Total	17224	17224	0
Passed	13122	13122	0
Failed	4102	4102	0
Panics	0	0	0
Coverage	76.18%	76.18%	0.00%