[FEATURE] Add attribute to store a calendar type in an event

[sandeep-ps]

Is your feature request related to a problem? Please describe.
Currently, we don't differentiate between events that are deadlines vs. regular events that occur at a place/online and time.

Describe the solution you'd like
We need an attribute to store calendar type (calendarType). This field can accept a couple of values for now, with Regular being the default value:

• Regular
• Dates and Deadlines

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context or screenshots about the feature request here.