feat: introduce new calendar control #296

.jshintc

development/issues/open/296.html

development/issues/open/296.mjs

flake.lock

jsconfig.json

nix/config/release.nix

package-lock.json

package.json

source/components/layout/popper.mjs

source/components/time/appointment.mjs

source/components/time/month-calendar.mjs

source/components/time/style/appointment.pcss

source/components/time/style/month-calendar.pcss

source/components/time/stylesheet/appointment.mjs

source/components/time/stylesheet/month-calendar.mjs

source/components/time/timeline/collection.mjs

source/components/time/timeline/item.mjs

source/components/time/timeline/segment.mjs

source/components/time/timeline/style/segment.pcss

source/components/time/timeline/stylesheet/segment.mjs