chore: initialize monorepo tooling

eslint.config.mjs

@@ -0,0 +1,19 @@
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+  { ignores: ["**/dist/**", "**/.next/**", "**/node_modules/**", "prototype/**"] },
+  eslint.configs.recommended,
+  ...tseslint.configs.recommendedTypeChecked,
+  {
+    languageOptions: {
+      parserOptions: { projectService: true, tsconfigRootDir: import.meta.dirname },
+    },
+    rules: {
+      "@typescript-eslint/consistent-type-imports": "error",
+      "@typescript-eslint/no-floating-promises": "error",
+      "@typescript-eslint/no-misused-promises": ["error", { checksVoidReturn: false }],
+      "@typescript-eslint/no-explicit-any": "warn",
+    },
+  },
+);