Calendar: Inline header slot

[mateenagy]

Describe the bug

It is not really a bug, but it not make so much sense to me.

If the Calendar used with inline we are able to use the header slot. This header slot is kind of useless in this form because we can only append things before the built in header, but I think it's make more sense to have control for the whole header and expose the important values for control and display.

My use case here is for example I want disable the year/month selector when the date is clicked (without the pointer-events: none workaround) and also to control the button visibility logic.

In the Reproducer link I linked a proof of concept update in the Calendar component. It will expose some data and events for the header which can be used while creating custom template content

Reproducer

https://github.com/mateenagy/primevue/blob/master/components/lib/calendar/Calendar.vue

PrimeVue version

3.52.0

Vue version

3.x

Language

TypeScript

Build / Runtime

Vue CLI App

Browser(s)

No response

Steps to reproduce the behavior

No response

Expected behavior

No response