Why can't I define custom `find` proc and override one from the system module?

[alexeypetrushin]

Can we consider maybe renaming `find` to `find_index` and moving to `sequtils`?

And maybe limit its scope somehow, as currently it's impossible to override it 
and there are lots of methods that can use `find` name, like:
    
    
    sequence.find((v) => v == 2)
    db.collection("posts").find(id = 10)
    ...
    
    
    Run