feat: add contact page with form handling and validation

- Implemented a contact page with a form for user inquiries.
- Added validation for form fields using Zod schema.
- Integrated PostgreSQL database for storing contact messages.
- Created necessary API endpoints for form submission.
- Added admin authentication and session management.
- Developed CGU, cookies policy, privacy policy, and legal mentions pages.
- Set up Docker configuration for PostgreSQL and application services.
- Enhanced UI with responsive design and accessibility features.

lib/contact.ts

@@ -0,0 +1,51 @@
+import { z } from "zod";
+import { normalizeProjectParam, PROJECT_LABELS, PROJECT_VALUES } from "@/lib/sites";
+
+export const requestTypeValues = ["bug", "question", "suggestion", "other"] as const;
+
+export type RequestTypeValue = (typeof requestTypeValues)[number];
+
+export const projectValues = PROJECT_VALUES;
+
+export const REQUEST_TYPE_LABELS: Record<RequestTypeValue, string> = {
+  bug: "Bug 🐛",
+  question: "Question ❓",
+  suggestion: "Suggestion 💡",
+  other: "Autre",
+};
+
+export const contactPayloadSchema = z.object({
+  name: z.string().trim().min(2, "Le nom est requis").max(80, "Nom trop long"),
+  email: z
+    .string()
+    .trim()
+    .min(1, "L'email est requis")
+    .email("Email invalide")
+    .max(160, "Email trop long"),
+  project: z.enum(projectValues, {
+    error: "Projet invalide",
+  }),
+  requestType: z.enum(requestTypeValues, {
+    error: "Type de demande invalide",
+  }),
+  message: z
+    .string()
+    .trim()
+    .min(10, "Le message doit contenir au moins 10 caracteres")
+    .max(3000, "Le message est trop long"),
+  honeypot: z
+    .string()
+    .optional()
+    .transform((value) => value ?? "")
+    .refine((value) => value.trim().length === 0, "Spam detecte"),
+  sourceUrl: z
+    .string()
+    .trim()
+    .max(500, "URL trop longue")
+    .optional()
+    .transform((value) => value ?? ""),
+});
+
+export type ContactPayload = z.infer<typeof contactPayloadSchema>;
+
+export { normalizeProjectParam, PROJECT_LABELS };