feat: new methods and tidy #174 #173

playground/tab/index.html

source/components/events.mjs

source/components/form/button-bar.mjs

source/components/form/events.mjs

source/components/form/reload.mjs

source/components/form/shadow-reload.mjs

source/components/form/tabs.mjs

source/components/form/template.mjs

source/components/layout/events.mjs

source/components/layout/style/tabs.pcss

source/components/layout/stylesheet/tabs.mjs

source/components/layout/tabs.mjs