Agenda v2 (#2716)

* Expositions (#2714)

* wip

* exhibitions

* title

* Événements enfants (#2705)

* child events

* slug

* fix

* parent

* children

* clean

* nice and smooth

* TimeSlot model

* small css tweak

* timeslot

* wip

* timeslots managed

* ui clean

* We have a loop!

* notifs

* fix

* build future

* nice urls

* archives

* deletion

* typos, move methods to specific event

* order

* add dependent destroy

* fix

* locales

* fix

* fix

* fix

* validate time slot datetime

* wip create time slots job

* fix pattern in website

* fix

* fix

* title

* time slot job

* scope day for_language

* event text

* adjust vue

* event_l10n.notes

* order timeslots in static

* fix order

* order event + fix job

* add text and notes to exhibition l10ns

* add place to exhibition l10ns + fix display text & notes

* fix ordered scope

* fix

* event.day permalink

* fix best bodyclass

* years and months

* wip

* namespace

* working

* wip

* good step

* working with events and time slots

* everything is broken, i'm lost

* better

* wip

* done

* remove edit website button

* render parent event file

* fix

* skip slug

* wip permalinks and git paths

* fix

* timeslots

* event

* day

* fix

* Fix #2763

* slugs for the commits

* doc

* fix

* fix

* fix month paths

* doc

* fix job

* Fix month slugs

* unique slug for single events

* fix

* doc

* wip slug unicity for events

* prevent numeric only slug for events localizations

* fix

* better dependencies

* all days in month

* normalize period day static list

* Month breadcrumb

* enhance

* scoe unicity for events

* time slot static fix

* 3 static files

Co-authored-by: Pierre-André Boissinot <pierreandre.boissinot@noesya.coop>
Co-authored-by: Sébastien Gaya <sebastien.gaya@gmail.com>

* merge

* fix

* fix

* Fix #2768

* Static previews

* website with time zone

* fix

Co-authored-by: Pierre-André Boissinot <pierreandre.boissinot@noesya.coop>
Co-authored-by: Sébastien Gaya <sebastien.gaya@gmail.com>

* fix children static

* touch parent when creating a child event

* fix

* fix

* add unique index in periods

* bodyclass

* stop generating agenda archives

* first day exception removal

* current time slots

* new paths

* polymorphic hugo

* fix order

* unpublish archives

* better with sebou

* month in breadcrumb

* update months

* better month

* Fix #2781

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Co-authored-by: Sébastien Gaya <sebastien.gaya@gmail.com>
Co-authored-by: pabois <pierreandre.boissinot@noesya.coop>