Add calendar page

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 83120cc):

https://panel-dev-beeoclock--pr350-feature-calendar-2y27xzrb.web.app

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[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 3a2a8d5):

https://panel-beeoclock--pr350-feature-calendar-m0vn4a64.web.app

_{(expires Sun, 28 Jan 2024 13:41:11 GMT)}

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[OleksiiDovhaniuk]

Години поверх sidebar коли відкриваєш меню