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/minecraftservices/minecraft/profile/name/[name].js

@@ -0,0 +1,44 @@
+const express = require("express")
+const authService = require("../../../../../services/authService")
+const { DefaultError, ServiceError } = require("../../../../../errors/errors")
+const router = express.Router({ mergeParams: true })
+
+router.get("/available", async (req, res) => {
+    try {
+        await authService.verifyAccessToken({ accessToken: req.headers.authorization.replace("Bearer", "").trim() })
+        const isAvailable = await authService.checkUsernameAvailability(req.params.name)
+        return res.status(200).json({ status: isAvailable.status })
+    } catch (error) {
+        if (error instanceof DefaultError) {
+            throw new ServiceError(error.code, req.originalUrl, null, null, null)
+        }
+        throw error
+    }
+})
+
+router.put("/", async (req, res) => {
+    try {
+        const player = await authService.verifyAccessToken({ accessToken: req.headers.authorization.replace("Bearer", "").trim() })
+        const newName = req.params.name
+
+        await userService.changeUsername(player.uuid, newName)
+
+        const skinsResult = await userService.getSkins({ uuid: player.uuid })
+        const capesResult = await userService.getCapes({ uuid: player.uuid })
+
+        return res.status(200).json({
+            id: player.uuid.replace(/-/g, ""),
+            name: newName,
+            skins: skinsResult.data || [],
+            capes: capesResult.data || []
+        })
+
+    } catch (err) {
+        const mcStatus = err.code === 409 ? "DUPLICATE" : (err.code === 400 || err.code === 403) ? "NOT_ALLOWED" : null
+        const finalCode = (mcStatus === "DUPLICATE") ? 403 : (err.code || 500)
+        const errorType = mcStatus ? "FORBIDDEN" : (err.error || "Internal Server Error")
+        throw new ServiceError(finalCode, req.originalUrl, errorType, err.message, mcStatus ? { status: mcStatus } : null)
+    }
+})
+
+module.exports = router