style: configure eslint and fix lint errors

.prettierrc.mjs

@@ -0,0 +1,6 @@
+/** @type {import("prettier").Config} */
+export default {
+    tabWidth: 4,
+    semi: false,
+    quotes: "single",
+}

eslint.config.mjs

@@ -0,0 +1,54 @@
+import eslintJS from "@eslint/js"
+import tsEslint from "typescript-eslint"
+
+export default tsEslint.config({
+    files: ["**/*.ts"],
+    ignores: [
+        "**/rs",
+        "**/out",
+        "**/pkg",
+        "**/dist",
+        "**/*.d.ts",
+        "src/test/**/*",
+        "src/wasm/**/*",
+        "src/assets/**/*",
+        "__mocks__/vscode.ts",
+    ],
+    languageOptions: {
+        parserOptions: {
+            project: true,
+            tsconfigRootDir: import.meta.dirname,
+        },
+    },
+    extends: [
+        eslintJS.configs.recommended,
+        ...tsEslint.configs.recommended,
+        ...tsEslint.configs.stylistic,
+    ],
+    rules: {
+        "@typescript-eslint/explicit-member-accessibility": [
+            "off",
+            {
+                accessibility: "explicit",
+            },
+        ],
+        "arrow-parens": ["off", "always"],
+        "import/order": "off",
+        "@typescript-eslint/member-ordering": "off",
+        "no-underscore-dangle": "off",
+        "@typescript-eslint/naming-convention": "off",
+        "jsdoc/newline-after-description": 0,
+        "@typescript-eslint/consistent-indexed-object-style": "off",
+        "@typescript-eslint/array-type": "off",
+        "no-extra-boolean-cast": "off",
+        "@typescript-eslint/no-empty-function": "off",
+        "@typescript-eslint/no-explicit-any": "off",
+        "@typescript-eslint/no-inferrable-types": "off",
+        "@typescript-eslint/no-unused-vars": "off",
+        "@typescript-eslint/ban-ts-comment": "off",
+        "no-case-declarations": "off",
+        "no-prototype-builtins": "off",
+        "@typescript-eslint/consistent-type-definitions": "off",
+        "@typescript-eslint/adjacent-overload-signatures": "off",
+    },
+})