Localisation (#39)

* Localisation

* Update tests

* Fix map markers in English view

* Fix typo

middleware.ts

@@ -0,0 +1,15 @@
+import createMiddleware from 'next-intl/middleware';
+
+export default createMiddleware({
+  // A list of all locales that are supported
+  locales: ['fr', 'en'],
+
+  // If this locale is matched, pathnames work without a prefix (e.g. `/tournois`)
+  defaultLocale: 'fr'
+});
+
+export const config = {
+  // Skip all paths that should not be internationalized. This example skips certain folders
+  // such as "api", and all files with an extension (e.g. favicon.ico)
+  matcher: ['/((?!api|_next|robots|.*\\..*).*)']
+}