Enhancement: Convert password_forgotten email to Notification Module

[blaine-cwe]

Explain the details for making this change. What existing problem does it solve?
Currently, the password_forgotten.php script uses a hardcoded email generation routine directly in the root file. This makes it impossible for shop owners to customize, heavily style, or convert the password reset email to HTML without modifying core files.

This proposal updates password_forgotten.php to route the reset email through the existing Notifications::notify() system. This brings the password reset architecture completely in line with the modern "Create Account" and "Order Update" modular notification systems.

Test plan (required)

Baseline Test: On a stock 1.0.8.x install, trigger a password reset. Observe the standard plain-text email arrives via the hardcoded root file routine.

Apply Changes:

    Replace the $db->query email block in password_forgotten.php with Notifications::notify('password_forgotten', [...]);

    Upload the proposed stock n_password_forgotten controller, template, and language file.

Core Verification: Trigger another password reset. Observe that the exact same plain-text email arrives, proving the module perfectly replicates core functionality.

Override Verification: Install a custom/3rd-party HTML notification module mapped to the password_forgotten trigger. Run the reset form again and observe that the custom HTML email is delivered without any further core modifications.

[blaine-cwe]

Please fork v1.1.0.7, make the changes, then submit a PR to the current dev branch (1.1.0.8) for testing.
Or upload a .zip (of just the changed/new files) to the forum if you prefer.

[blaine-cwe]

PR submitted.