Update Eslint and Typescript with stricter type checking

.gitignore

@@ -27,3 +27,4 @@ docs-out
 .cdk.staging
 cdk.out
 lambda.zip
+.DS_Store

.prettierignore

@@ -0,0 +1,16 @@
+node_modules
+dist
+**/src/generated/**
+buf.lock
+.idea
+.api
+!.api/.gitkeep
+test_report
+restate-sdk-test-suite.jar
+.restate
+docs-out
+.wrangler
+.next
+.cdk.staging
+cdk.out
+lambda.zip

eslint.config.js

@@ -0,0 +1,87 @@
+import js from "@eslint/js";
+import globals from "globals";
+import tseslint from "typescript-eslint";
+import json from "@eslint/json";
+
+export default [
+  {
+    ignores: [
+      "**/dist/**",
+      "**/node_modules/**",
+      "**/.next/**",
+      "**/.wrangler/**",
+      ".turbo/**",
+      "**/next-env.d.ts",
+      "**/sdk_shared_core_wasm_bindings.js",
+      "**/*.mjs",
+      "**/test/**",
+      "**/api-extractor.json",
+    ],
+  },
+  {
+    files: ["**/*.{js,mjs,cjs}"],
+    ...js.configs.recommended,
+    languageOptions: {
+      globals: globals.node,
+    },
+  },
+  ...tseslint.configs.recommendedTypeChecked.map((config) => ({
+    ...config,
+    files: ["**/*.{ts,tsx,mts,cts}"],
+  })),
+  {
+    files: ["**/*.{ts,tsx,mts,cts}"],
+    languageOptions: {
+      globals: globals.node,
+      parserOptions: {
+        projectService: true,
+        tsconfigRootDir: import.meta.dirname,
+      },
+    },
+    rules: {
+      "@typescript-eslint/no-unused-vars": [
+        "error",
+        { argsIgnorePattern: "^_", varsIgnorePattern: "^_" },
+      ],
+      "@typescript-eslint/no-empty-object-type": [
+        "error",
+        { allowInterfaces: "always" },
+      ],
+      "@typescript-eslint/restrict-template-expressions": [
+        "error",
+        {
+          allowNever: true,
+          allowArray: true,
+        },
+      ],
+      "no-console": "error",
+    },
+  },
+  {
+    files: [
+      "**/packages/restate-sdk-examples/**/*.ts",
+      "**/packages/restate-e2e-services/**/*.ts",
+      "**/packages/restate-sdk-testcontainers/**/*.ts",
+    ],
+    rules: {
+      "no-console": "off",
+      "@typescript-eslint/require-await": "off",
+      "@typescript-eslint/no-floating-promises": "off",
+    },
+  },
+  {
+    files: ["**/*.config.{js,ts,mjs,mts}"],
+    ...tseslint.configs.disableTypeChecked,
+  },
+  {
+    files: ["**/*.json"],
+    ignores: ["package-lock.json"],
+    language: "json/json",
+    ...json.configs.recommended,
+  },
+  {
+    files: ["**/tsconfig*.json", ".vscode/*.json"],
+    language: "json/jsonc",
+    ...json.configs.recommended,
+  },
+];