Refactored and fixed:

- Refactored, linted, fixed potential problems, enabled 'use strict'

Fixed:
- Added "Enable plugin synchronization" option
(Plugins and settings had been run always)

Implemented:
- Sync preset implemented.
- "Check integrity on saving" implemented.
- "Sanity check" implemented
It's mainly for debugging.

.eslintrc

@@ -0,0 +1,19 @@
+{
+    "root": true,
+    "parser": "@typescript-eslint/parser",
+    "plugins": ["@typescript-eslint"],
+    "extends": ["eslint:recommended", "plugin:@typescript-eslint/eslint-recommended", "plugin:@typescript-eslint/recommended"],
+    "parserOptions": {
+        "sourceType": "module"
+    },
+    "rules": {
+        "no-unused-vars": "off",
+        "@typescript-eslint/no-unused-vars": ["error", { "args": "none" }],
+        "@typescript-eslint/ban-ts-comment": "off",
+        "no-prototype-builtins": "off",
+        "@typescript-eslint/no-empty-function": "off",
+        "require-await": "warn",
+        "no-async-promise-executor": "off",
+        "@typescript-eslint/no-explicit-any": "off"
+    }
+}