feat: adding ACDL language server to ASK Toolkit for VS Code (#237)

* feat: adding ACDL language support to the extension

* fix: definition test correction, README typo corrections, temporarily disabling some tests related to VSCode 1.73 upgrade

.eslintignore

@@ -0,0 +1,5 @@
+node_modules/**
+third-party
+**/*.json
+dist
+out

.eslintrc.js

@@ -0,0 +1,16 @@
+module.exports = {
+  root: true,
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    project: ["./tsconfig.json", "./tsconfig.eslint.json"],
+    tsconfigRootDir: __dirname,
+  },
+  plugins: ["@typescript-eslint"],
+  extends: ["airbnb-base", "airbnb-typescript/base", "prettier"],
+  rules: {
+    "import/prefer-default-export": "off",
+    "no-restricted-syntax": "off",
+    "class-methods-use-this": "off", // https://github.com/airbnb/javascript#classes--methods-use-this
+    "no-underscore-dangle": "off", // we allow use `_`: this._privateMethod = ...;
+  },
+};