Fixed linting file deprecations and unified config to one file without actual configurational changes

Author: eirikhanasand

.eslintignore

@@ -0,0 +1,45 @@
+import eslint from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import typescriptParser from '@typescript-eslint/parser';
+import stylisticJs from '@stylistic/eslint-plugin-js';
+
+export default [
+    eslint.configs.recommended,
+    ...tseslint.configs.recommended,
+    {
+        ignores: ['dist', 'node_modules'],
+        plugins: {
+            '@stylistic/js': stylisticJs,
+        },
+        languageOptions: {
+            sourceType: 'module',
+            ecmaVersion: 2024,
+            parser: typescriptParser
+        },
+        rules: {
+            'strict': 'error',
+            'no-var': 'error',
+            'array-callback-return': 'error',
+            'yoda': 'error',
+            '@stylistic/js/indent': [
+                'error',
+                4,
+            ],
+            '@stylistic/js/linebreak-style': [
+                'error',
+                'unix'
+            ],
+            '@stylistic/js/quotes': [
+                'error',
+                'double'
+            ],
+            '@stylistic/js/semi': [
+                'error',
+                'always'
+            ],
+            '@typescript-eslint/no-unused-vars': 'error',
+            '@typescript-eslint/ban-ts-comment': 'off',
+            '@typescript-eslint/no-non-null-assertion': 'off'
+        }
+    }
+];