Added a "buy a designed one instead" option next to the free builder

ResumeForge stays free, no plans to change that. But some people just want a nice-looking resume without fiddling with the builder, so I made a small set of pre-designed, editable resume and cover letter templates (Classic/Modern/Minimal, matching pair) and linked them from the footer here for anyone who wants that instead. Selling on Gumroad, Payhip and Lemon Squeezy. Mostly curious whether visitors coming for a free tool ever convert to a paid companion product, or if that link just gets ignored.