new class for styling tomorrow events

[powdah07]

Current Behavior
Currently, there is no possibility for filtering tomorrow events to style by card-mod.

Expected behaviour
I expected there to be a class like 'current-day'.

Possible Solutions
Implement a class for tomorrow events like it's done for current-day events.

Context / Reason
I would like to color-code calendar entries based on their due dates. Today (red) and tomorrow (yellow). The events of the current day can already be styled with card_mod and the class 'current-day.' Thank you for the great card.

[hardrockhodl]

'current-day' only mods the date on event-left not event-right.

I would want to be able to mod upcoming events and todays event-right.
and current-day.hours upcoming.hours

- type: custom:atomic-calendar-revive
    enableModeChange: true
    entities:
      - entity: calendar.skolmat_ics
        color: dodgerblue
      - entity: calendar.gemensam
        color: chocolate
    defaultMode: Event
    europeanDate: true
    showDate: false
    offsetHeaderDate: false
    showAllDayEvents: true
    compactMode: false
    showMonth: false
    showColors: true
    showDescription: false
    showProgressBar: false
    showWeekDay: true
    showNoEventsForToday: false
    hoursOnSameLine: false
    showAllDayHours: false
    showHiddenText: false
    showRelativeTime: false
    showEventDate: true
    showTimeRemaining: false
    showDatePerEvent: true
    maxDaysToShow: 20
    showLoader: false
    showEventIcon: false
    showWeekNumber: true
    card_mod:
      style: |
        ha-card {
          font-size: 25px;
          color: grey;
        .week-number {
          color: grey;
          font-size: 14px;
          border: 0px;
          }
        .hours {
          color: tomato;
          font-size: 16px;
          }
        .event-left {
          justify-content: center;
          color: grey;
          font-size: 17px;
          display: flex;
          flex-direction: row;
          }
        .event-right {
          color: green;
          font-size: 20px;
          display: flex;
          flex-direction: row;
          }
        .current-day {
          color: green;
          font-size: 20px;
          }
        .event-left.current-day {
          color: red;
          font-size: 20px;
          }
        .event-right.current-day {
          color: red;
          font-size: 22px;
          }
        }