Initial project structure and core files

Add base project files including environment example, license, README, .gitignore, error classes, ESLint config, database modules, texture assets, repositories, routes, schemas, services, and server entry point. This establishes the foundational structure for a Yggdrasil-compatible REST API with modular error handling, database setup, and route organization.

routes/api/users/profiles/minecraft/[username].js

@@ -0,0 +1,27 @@
+const express = require("express")
+const utils = require("../../../../../modules/utils")
+const userService = require("../../../../../services/userService")
+const authService = require("../../../../../services/authService")
+const { ServiceError } = require("../../../../../errors/errors")
+const router = express.Router({ mergeParams: true })
+
+router.get("", async (req, res) => {
+    const profile = await userService.getLegacyProfile(req.params.username)
+    const isUsernameOK = await authService.checkUsernameAvailability(newName)
+    const at = req.query.at
+    if (at != undefined && utils.isTrueFromDotEnv("SUPPORT_UUID_TO_NAME_HISTORY")) {
+        const history = await userService.getNameUUIDs(parseInt(at))
+        return res.status(history.code).json(history.data)
+    } else {
+        throw new ServiceError(400, req.originalUrl, "IllegalArgumentException", "Invalid timestamp.")
+    }
+    if (isUsernameOK.status != "AVAILABLE") {
+        throw new ServiceError(400, req.originalUrl, "CONSTRAINT_VIOLATION", "Invalid username.")
+    }
+    if (!profile) {
+        return res.status(204).send()
+    }
+    return res.status(200).json(profile)
+})
+
+module.exports = router