Support TIMESTAMP on advanced searching

[lyz-code]

Does this feature exist in Emacs orgmode core?

Yes

Orgmode link

https://orgmode.org/worg/org-tutorials/advanced-searching.html#querying-timestamps

A few words should be said here about querying timestamps contained in the following properties: DEADLINE, SCHEDULED, TIMESTAMP (the first active timestamp in an entry), and TIMESTAMP_IA (the first inactive timestamp in an entry). 

Feature value

I want to make some custom agenda commands that deals with headlines that have a DEADLINE or SCHEDULED or timestamp (<2025-01-01>). For example:

• I want an agenda of today that only shows elements that have any date set for today
• I want to gather elements that have a deadline, scheduled, or date in the next 10 days

I don't know if it's currently supported in a way that I haven't thought of, but TIMESTAMP looks a clean solution

Additional context

No response