Replace "FastNext" branding with "PragmaStack" across the project

- Updated all references, metadata, and templates to reflect the new branding, including layout files, components, and documentation.
- Replaced hardcoded color tokens like `green-600` with semantic tokens (`success`, `warning`, etc.) for improved design consistency.
- Enhanced `globals.css` with new color tokens for success, warning, and destructive states using the OKLCH color model.
- Added comprehensive branding guidelines and updated the design system documentation to align with the new identity.
- Updated tests and mocks to reflect the branding changes and ensured all visual/verbal references match "PragmaStack".
- Added new `branding/README.md` and `branding` docs for mission, values, and visual identity definition.

frontend/src/components/layout/Footer.tsx

@@ -15,7 +15,7 @@ export function Footer() {
       <div className="container mx-auto px-4 py-6">
         <div className="flex flex-col items-center justify-between space-y-4 md:flex-row md:space-y-0">
           <div className="text-center text-sm text-muted-foreground md:text-left">
-            © {currentYear} FastNext Template. All rights reserved.
+            © {currentYear} PragmaStack. All rights reserved.
           </div>
           <div className="flex space-x-6">
             <Link
@@ -25,7 +25,7 @@ export function Footer() {
               Settings
             </Link>
             <a
-              href="https://github.com/yourusername/fastnext-stack"
+              href="https://github.com/cardosofelipe/pragmastack"
               target="_blank"
               rel="noopener noreferrer"
               className="text-sm text-muted-foreground hover:text-foreground transition-colors"

frontend/src/components/layout/Header.tsx

@@ -83,7 +83,7 @@ export function Header() {
         {/* Logo */}
         <div className="flex items-center space-x-8">
           <Link href="/" className="flex items-center space-x-2">
-            <span className="text-xl font-bold text-foreground">FastNext</span>
+            <span className="text-xl font-bold text-foreground">PragmaStack</span>
           </Link>
 
           {/* Navigation Links */}