string templating function

[universalmind303]

Description

it'd be nice to have a string formatting function similar to format! in rust, or js's backtick syntax

example usage

// using inside the brackets
select format("hello my name is {first_name} {last_name}") from users;
// varargs
select format("hello my name is {} {}", first_name, last_name) from users;

// should work with other dtypes as well
select format("hello my name is {} {}\n today's date is {}", first_name, last_name, now()) from users;