Add user profile page (#302)

* Add user page and API endpoint

* add: /user/[id] page
* add: /api/v1/user/[id] API endpoint

* Change loading message in user profile page

* Fix build errors, prettier code

server/api/v1/user/[id]/index.get.ts

@@ -0,0 +1,29 @@
+import aclManager from "~/server/internal/acls";
+import prisma from "~/server/internal/db/database";
+
+export default defineEventHandler(async (h3) => {
+  const requestingUser = await aclManager.getUserACL(h3, ["read"]);
+  if (!requestingUser) throw createError({ statusCode: 403 });
+
+  const userId = getRouterParam(h3, "id");
+  if (!userId)
+    throw createError({
+      statusCode: 400,
+      statusMessage: "No userId in route.",
+    });
+
+  const user = await prisma.user.findUnique({
+    where: { id: userId },
+    select: {
+      id: true,
+      username: true,
+      displayName: true,
+      profilePictureObjectId: true,
+    },
+  });
+
+  if (!user)
+    throw createError({ statusCode: 404, statusMessage: "User not found." });
+
+  return user;
+});