Add URL preview (#1511)

* URL preview - WIP

* fix url preview regex

* update url match regex

* add url preview components

* add scroll btn url preview holder

* add message body component

* add url preview toggle in settings

* update url regex

* improve url regex

* increase thumbnail size in url preview

* hide url preview in encrypted rooms

* add encrypted room url preview toggle

src/app/utils/regex.ts

@@ -1,3 +1,5 @@
+export const HTTP_URL_PATTERN = `https?:\\/\\/(?:www\\.)?(?:[^\\s)]*)(?<![.,:;!/?()[\\]\\s]+)`;
+
 export const URL_NEG_LB = '(?<!(https?|ftp|mailto|magnet):\\/\\/\\S*)';
 
 // https://en.wikipedia.org/wiki/Variation_Selectors_(Unicode_block)