19 implement i18n (#29)

* init paraglide

* change export

* shared session check

* message param

* format

* check user is present

A session can exist without a user, if the user was recently deleted

* wtf

* lol bad redirect code

messages/en.json

@@ -0,0 +1,4 @@
+{
+	"$schema": "https://inlang.com/schema/inlang-message-format",
+	"greeting": "Hello {name}!"
+}