fix: migrate eslint configurations (#61)

* re-introduce tests + improve workflow + lib updates.

* remove yarn.lock

* update eslint configurations

Author: Astrect

.eslintignore

@@ -0,0 +1,47 @@
+import { defineConfig, globalIgnores } from "eslint/config";
+import typescriptEslintEslintPlugin from "@typescript-eslint/eslint-plugin";
+import tsParser from "@typescript-eslint/parser";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import js from "@eslint/js";
+import { FlatCompat } from "@eslint/eslintrc";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+    baseDirectory: __dirname,
+    recommendedConfig: js.configs.recommended,
+    allConfig: js.configs.all
+});
+
+export default defineConfig([globalIgnores(["*", "!src", "src/__tests__"]), {
+    extends: compat.extends("prettier"),
+
+    plugins: {
+        "@typescript-eslint": typescriptEslintEslintPlugin,
+    },
+
+    languageOptions: {
+        parser: tsParser,
+        ecmaVersion: 5,
+        sourceType: "script",
+
+        parserOptions: {
+            project: "./tsconfig.json",
+        },
+    },
+
+    rules: {
+        "@typescript-eslint/explicit-function-return-type": "off",
+        "@typescript-eslint/no-explicit-any": "off",
+        "@typescript-eslint/no-empty-function": "warn",
+        "@typescript-eslint/no-namespace": "off",
+        "@typescript-eslint/no-use-before-define": "off",
+    },
+}, {
+    files: ["./src/configs.ts", "./src/utils/Jagex.ts", "./src/lib/RuneScape.ts"],
+
+    rules: {
+        "@typescript-eslint/camelcase": "off",
+    },
+}]);

.eslintrc

@@ -30,6 +30,8 @@
     "slugify": "^1.5.0"
   },
   "devDependencies": {
+    "@eslint/eslintrc": "^3.3.4",
+    "@eslint/js": "^10.0.1",
     "@types/jest": "^30.0.0",
     "@typescript-eslint/eslint-plugin": "^8.56.1",
     "@typescript-eslint/parser": "^8.56.1",