fr(datepicker): add support for 2 month side-by-side UI

[mmalerba]

Material Design has officially added this to the spec: https://material.io/components/pickers/#desktop-pickers

[angular-robot]

Just a heads up that we kicked off a community voting process for your feature request. There are 20 days until the voting process ends.

Find more details about Angular's feature request process in our documentation.

[LiamKenneth]

any update on this?

[shinkhouse-nfsmith]

Any update on this?

[elyasesna]

hello everyone, is this issue in progress? any updates?