Update calendar card to allow variable height, better multi-day event support

[hoverduck]

Proposed change

This allows the Calendar card to behave the same way as the Calendar panel from the sidebar, where multi-day events are displayed in blocks spanning the calendar rather than on the start date only.

This revisits a design decision made in #14660, where the behavior was allowed to differentiate. The argument in that PR was that the Calendar Card was too cramped to effectively display the multi-day events, so I've also added an option to choose the card's height.

Type of change

• Dependency upgrade
• 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: calendar
entities:
  - calendar.local_test
multi_day: true
height: 900

Additional information

• This PR fixes or closes issue: fixes #
• This PR is related to issue or discussion:
• Link to documentation pull request: Add multi-day and height options to Calendar Card home-assistant.io#36201

Checklist

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

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

• Documentation added/updated for www.home-assistant.io

[home-assistant]

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[home-assistant]

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