Client JWT authentication (#723)

## Description:

Send JWT to the game server for verification.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [ ] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>

src/core/ApiSchemas.ts

@@ -0,0 +1,48 @@
+import { z } from "zod";
+import { base64urlToUuid } from "./Base64";
+
+export const RefreshResponseSchema = z.object({
+  token: z.string(),
+});
+export type RefreshResponse = z.infer<typeof RefreshResponseSchema>;
+
+export const TokenPayloadSchema = z.object({
+  jti: z.string(),
+  sub: z
+    .string()
+    .refine(
+      (val) => {
+        const uuid = base64urlToUuid(val);
+        return uuid != null;
+      },
+      {
+        message: "Invalid base64-encoded UUID",
+      },
+    )
+    .transform((val) => {
+      const uuid = base64urlToUuid(val);
+      if (!uuid) throw new Error("Invalid base64 UUID");
+      return uuid;
+    }),
+  iat: z.number(),
+  iss: z.string(),
+  aud: z.string(),
+  exp: z.number(),
+  rol: z
+    .string()
+    .optional()
+    .transform((val) => val.split(",")),
+});
+export type TokenPayload = z.infer<typeof TokenPayloadSchema>;
+
+export const UserMeResponseSchema = z.object({
+  user: z.object({
+    id: z.string(),
+    avatar: z.string(),
+    username: z.string(),
+    global_name: z.string(),
+    discriminator: z.string(),
+    locale: z.string(),
+  }),
+});
+export type UserMeResponse = z.infer<typeof UserMeResponseSchema>;