Add soft delete to Deque

Problem

We have a lot of records in ### Deque. We want to clear all records from Deque
In our cases we don't need to clear the data on the blockchain, we can overwrite it

Solution

I suggest adding a method clear for soft delete that sets Tail to 0.

OR

Change visibility methods from private to public

tail
head
set_tail
set_head

Temporary Solution

Now, I need to do it manually through the code

let full_key = namespaces_with_key(&["players".as_bytes()], b"t");
ctx.deps.storage.set(&full_key, &(0 as u32).to_be_bytes());

Start by locating the Deque implementation and examining the existing tail, head, set_tail, and set_head methods. Clarify whether the intended API is a clear method or public visibility changes, then define how soft deletion should behave and how completion will be verified against the manual storage update shown in the issue.