chore: use JS config file for ESLint (#45)

Author: MichaelDeBoey

.eslintrc.js

@@ -0,0 +1,68 @@
+"use strict"
+
+/** @type {import('eslint').Linter.Config} */
+module.exports = {
+    root: true,
+    extends: "plugin:@eslint-community/mysticatea/es2018",
+    parserOptions: {
+        project: "./tsconfig.eslint.json",
+    },
+    settings: {
+        node: {
+            tryExtensions: [
+                ".js",
+                ".json",
+                ".mjs",
+                ".node",
+                ".ts",
+                ".tsx",
+                ".vue",
+            ],
+        },
+    },
+    rules: {
+        // TSC does this
+        "no-redeclare": "off",
+        // https://github.com/typescript-eslint/typescript-eslint/issues/743
+        "@eslint-community/mysticatea/ts/unbound-method": "off",
+
+        // Temporary disabled rules
+        "@eslint-community/mysticatea/ts/naming-convention": "off",
+        "@eslint-community/mysticatea/ts/prefer-readonly-parameter-types":
+            "off",
+        // Should be fixed by `@eslint-community/eslint-plugin-mysticatea`
+        "no-duplicate-imports": "off",
+        "@eslint-community/mysticatea/ts/no-duplicate-imports": [
+            "error",
+            { includeExports: true },
+        ],
+    },
+    overrides: [
+        {
+            files: "./scripts/clone-without-circular.ts",
+            // Temporarily disable these rules until we fix the `any` usage
+            rules: {
+                "@eslint-community/mysticatea/eslint-comments/no-use": "off",
+                "@eslint-community/mysticatea/ts/no-unsafe-argument": "off",
+                "@eslint-community/mysticatea/ts/no-unsafe-assignment": "off",
+                "@eslint-community/mysticatea/ts/no-unsafe-member-access":
+                    "off",
+                "@eslint-community/mysticatea/ts/no-unsafe-return": "off",
+            },
+        },
+
+        {
+            files: "./src/unicode/ids.ts",
+            rules: {
+                curly: "off",
+                "no-misleading-character-class": "off",
+            },
+        },
+        {
+            files: "./src/unicode/property-data.ts",
+            rules: {
+                "@eslint-community/mysticatea/ts/camelcase": "off",
+            },
+        },
+    ],
+}

.eslintrc.yml

@@ -1,12 +1,3 @@
-/* Temporarily disable these rules until we fix the `any` usage */
-/* eslint
-    "@eslint-community/mysticatea/eslint-comments/no-use": "off",
-    "@eslint-community/mysticatea/ts/no-unsafe-argument": "off",
-    "@eslint-community/mysticatea/ts/no-unsafe-assignment": "off",
-    "@eslint-community/mysticatea/ts/no-unsafe-member-access": "off",
-    "@eslint-community/mysticatea/ts/no-unsafe-return": "off",
-*/
-
 import { posix } from "path"
 
 function resolveLocation(