[FEAT] Create Reset Password Email

[martingaldeca]

Type of Change

• 🚀 New feature (non-breaking change which adds functionality)
• 🐛 Bug fix (non-breaking change which fixes an issue)
• 🧹 Chore (technical task, refactoring, maintenance)

Description

This PR implements the email template required for the Password Reset flow and updates the visual theme.

Key Changes:

• New Email Template: Added src/templates/reset_password/content.html to handle password reset requests. It includes a secure link with a reset_token, expiry warning, and fallback link.
• Localization: Added English (en.json) and Spanish (es.json) translations for the reset password email subject, body, and buttons.
• Theme Update: Updated the primary color hex code in src/app/core/theme.py from #338f39 to #16a34a to match the updated design system.

Related Issue

Closes #5

How Has This Been Tested?

• Unit Tests
• Manual Testing (Verified the HTML rendering of the new template and color application)

Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

Screenshots (if applicable)