Issue #3189845: Create composer.json file and add dependencies

composer.json

+{
+  "name": "drupal/paragraphs_browser_previewer",
+  "description": "This module provides possibility to use functionalities from Paragraph Browser widget and Paragraph Previewer widget in one widget.",
+  "type": "drupal-module",
+  "license": "GPL-2.0-or-later",
+  "keywords": ["paragraphs", "browser", "previewer"],
+  "homepage": "https://www.drupal.org/project/paragraphs_browser_previewer",
+  "minimum-stability": "dev",
+  "authors": [
+    {
+      "name": "Andrew Siz",
+      "homepage": "https://www.drupal.org/u/andrewsizz"
+    }
+  ],
+  "support": {
+    "issues": "https://www.drupal.org/project/issues/paragraphs_browser_previewer",
+    "source": "https://git.drupalcode.org/project/paragraphs_browser_previewer"
+  },
+  "require": {
+      "drupal/core": "^8 || ^9 || ^10",
+      "drupal/paragraphs_previewer": "^1.0",
+      "drupal/paragraphs_browser": "^1.0"
+  }
+}