Feature-Request: Templates in context variables should support boolean values

• Cookiecutter version: 2.6.0
• Python version: 3.9.16
• Operating System: RHEL 8

This issue is a reopening of #1738.

Description:

As described here, we expect template authors to be able to reuse values of previous keys from cookiecutter.json, but currently that is not possible if you are working with boolean values. I believe it would be very important to support this use case or describe an alternative way to do it in docs. Example:

cookiecutter.json:

{
"likes_potatoes": false,
"likes_mashed_potatoes": "{{ cookiecutter.likes_potatoes }}"
}

Template example using above variables:

#!/bin/bash

{% if cookiecutter.likes_mashed_potatoes %}
echo "I like mashed potatoes!"
{% endif %}

The echo "I like mashed potatoes" line always renders, even when likes_potatoes is false.

Start by reproducing the example with the shown cookiecutter.json values and template conditional, then inspect the current template-in-context rendering behavior. Done means a boolean value reused through a context variable remains boolean, so the false value prevents the echo from rendering, with coverage for this example.