Feat/add calendar card

[brunosabot]

Proposed change

Add a new Calendar Card for Bubble Card

Warning

This PR is based on #1173. Do not merge before it's closed.

Type of change

• Bugfix (non-breaking change which fixes an issue)
• New feature (thank you!)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

Example configuration

type: custom:bubble-card
card_type: calendar
entities:
  - entity: calendar.xxx
    color: orange
  - entity: calendar.yyy
    color: red
  - entity: calendar.zzz
    color: "#93B5A4"
rows: 4
sub_button: []
card_layout: large
limit: 8
showEnd: true
showProgress: true

Example printscreens/gif

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request:

Additional documentation needed.

The calendar card has few features:

• Allow multiple calendars with their own color chip for differentiate them
• Limit the calendar to a specific amount of events
• Show the end time for non-daily events
• Show the current progression of the event.

Checklist

• The code change is tested and works locally.
• There is no commented out code in this PR.
• Tests screenshots/gifs have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated for readme.