docs: add category badges from portal #455

Job	Run time
Update code coverage (core, unit)	32s
Update code coverage (utils, int)	53s
Update code coverage (cli, unit)	47s
Update code coverage (models, int)	51s
Update code coverage (cli, int)	50s
Update code coverage (plugin-coverage, unit)	46s
Update code coverage (plugin-js-packages, int)	51s
Update code coverage (plugin-js-packages, unit)	46s
Update code coverage (plugin-coverage, int)	46s
Update code coverage (plugin-eslint, unit)	51s
Update code coverage (core, int)	46s
Update code coverage (models, unit)	48s
Update code coverage (utils, unit)	49s
Update code coverage (plugin-lighthouse, unit)	48s
Update code coverage (plugin-lighthouse, int)	43s
Update code coverage (plugin-eslint, int)	53s
Update code coverage (core, int)	46s
Update code coverage (cli, int)	50s
Update code coverage (plugin-eslint, unit)	51s
Update code coverage (plugin-coverage, unit)	46s
Update code coverage (utils, int)	53s
Update code coverage (plugin-eslint, int)	53s
Update code coverage (utils, unit)	49s
Update code coverage (models, int)	51s
Update code coverage (core, unit)	51s
Update code coverage (plugin-js-packages, unit)	46s
Update code coverage (plugin-coverage, int)	46s
Update code coverage (plugin-lighthouse, unit)	48s
Update code coverage (plugin-lighthouse, int)	43s
Update code coverage (plugin-js-packages, int)	51s
Update code coverage (models, unit)	48s
Update code coverage (cli, unit)	47s
	25m 39s

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