`Datepicker` component to be able to select just Months or Year

[Alexenon]

Proposed Features:

Month Picker Mode:

A mode where the DatePicker component only allows the user to select a month and year (ignoring the specific day).

• The UI should present a month selection interface.
• The selected value could return the first day\last day of the selected month as a LocalDate, or simply a month-year format.

Year Picker Mode:

A mode where the DatePicker allows users to select just a year.

• The UI should present only year navigation.
• The selected value could return a LocalDate for the first day of the selected year or simply a year format.
• Customizable Format: Ability to format the DatePicker for different patterns such as MM/yyyy or yyyy based on the mode.

There is already such question on Vaadin Forums, but there is no good answer for this.

Describe the solution you'd like

I know that there is a way to achieve this, by using native HTML component, but I'd like to have a vaadin component with the same functionality.

<input type="month" id="start" name="start" min="2018-03" value="2018-05" />

I don't know which exact Java API is the best. Examples:

• add additional methods to datePicker like datePicker.displayMode(Timestamp.MONTH)
• add additional methods to datePicker like datePicker.hide(Timestamp.DAYS)
• completely separate component like MonthPicker

Describe alternatives you've considered

No response

Additional context

Any workarounds will be great too 🗡️

[web-padawan]

Duplicate of https://github.com/vaadin/web-components/issues/1865. Please see the discussion in that issue.