feat: add contact, index, and work pages with responsive design and functionality

- Implemented a contact page with a form for inquiries and direct links to social profiles.
- Created an index page showcasing personal profile, capabilities, featured projects, and tech stack.
- Developed dynamic project detail pages with breadcrumb navigation and project-specific information.
- Added a projects overview page displaying all projects in a grid layout.
- Introduced global styles and typography mixins for consistent design across components.

src/data/site.ts

@@ -0,0 +1,37 @@
+export const site = {
+  name: "Louis Potevin",
+  handle: "unkn0wn",
+  role: "Full-stack developer",
+  domain: "louis-potevin.dev",
+  location: "Limoges · Nouvelle-Aquitaine",
+  // Job Search
+  availability: "Permanent contract (CDI) — September 2026",
+  mobility: "Anywhere in France, on-site or remote",
+  // Contact
+  email: "contact@louis-potevin.dev",
+  // External links (icons via simple-icons-astro)
+  links: {
+    gitea: {
+      label: "Gitea",
+      url: "https://git.novaprojects.dev/unkn0wn",
+      icon: "gitea",
+    },
+    github: {
+      label: "GitHub",
+      url: "https://github.com/unkn0wndo3s",
+      icon: "github",
+    },
+    npm: {
+      label: "npm",
+      url: "https://www.npmjs.com/~unkn0wndo3s",
+      icon: "npm",
+    },
+    linkedin: {
+      label: "LinkedIn",
+      url: "https://www.linkedin.com/in/louis-potevin",
+      icon: "linkedin",
+    },
+  },
+} as const;
+
+export type SiteLink = { label: string; url: string; icon: string };