Add Eslint check & Prettier on Svelte files

front/.eslintrc.js

@@ -0,0 +1,50 @@
+module.exports = {
+    "root": true,
+    "env": {
+        "browser": true,
+        "es6": true,
+        "node": true
+    },
+    "extends": [
+        "eslint:recommended",
+        "plugin:@typescript-eslint/eslint-recommended",
+        "plugin:@typescript-eslint/recommended-requiring-type-checking"
+    ],
+    "globals": {
+        "Atomics": "readonly",
+        "SharedArrayBuffer": "readonly"
+    },
+    "parser": "@typescript-eslint/parser",
+    "parserOptions": {
+        "ecmaVersion": 2018,
+        "sourceType": "module",
+        "project": "./tsconfig.json",
+        "extraFileExtensions": [".svelte"]
+    },
+    "plugins": [
+        "@typescript-eslint",
+        "svelte3"
+    ],
+    "overrides": [
+        {
+          "files": ["*.svelte"],
+          "processor": "svelte3/svelte3"
+        }
+    ],
+    "rules": {
+        "no-unused-vars": "off",
+        "@typescript-eslint/no-explicit-any": "error",
+        // TODO: remove those ignored rules and write a stronger code!
+        "@typescript-eslint/no-floating-promises": "off",
+        "@typescript-eslint/no-unsafe-call": "off",
+        "@typescript-eslint/restrict-plus-operands": "off",
+        "@typescript-eslint/no-unsafe-assignment": "off",
+        "@typescript-eslint/no-unsafe-return": "off",
+        "@typescript-eslint/no-unsafe-member-access": "off",
+        "@typescript-eslint/restrict-template-expressions": "off"
+    },
+    "settings": {
+        "svelte3/typescript": true,
+        "svelte3/ignore-styles": () => true
+    }
+}