add the PHP file to Tome's export system

Problem/Motivation

Use of this module can be simplified by adding the static_contact_form_action.php.example file to Tome's export system.

The PHP file would then get automatically created in the Tome export directory.

Ideally, you woudn't also have to edit the file manually. I can see several ways to handle the email addresses that the script needs:

1. use ENV variables
2. Add a settings form to this module, and have this module write a copy of static_contact_form_action.php.example to a different location, such as the files folder, where Tome would read it.
3. Add a settings form to this module, and add as the Tome export path a route which outputs the PHP code for the file to write, with the settings replaced.

Steps to reproduce

Proposed resolution

Remaining tasks

User interface changes

API changes

Data model changes