Implement all logic on the client side in csvxmlV2.js

For completing the rewrite, translations and some UI work are still
needed.

See #14

public/assets/js/jszip/.eslintrc.js

@@ -0,0 +1,43 @@
+"use strict";
+
+module.exports = {
+    "env": {
+        "browser": true,
+        "commonjs": true,
+        "es2021": true,
+        "node": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "ecmaVersion": "latest"
+    },
+    "ignorePatterns": ["vendor/*.js", "dist/*.js", "test/jquery-1.8.3.min.js"],
+    "rules": {
+        "indent": [
+            "error",
+            4
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "double"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ],
+        "curly": "error",
+        "eqeqeq": "error",
+        "no-new": "error",
+        "no-caller": "error",
+        "guard-for-in": "error",
+        "no-extend-native": "error",
+        "strict": [
+            "error",
+            "global"
+        ],
+    }
+};