feat: Lets users insert connected portal article into replies [CW-2282] (#8117)

- Lets users insert connected portal articles into replies

https://linear.app/chatwoot/issue/CW-2282/list-all-the-top-articles-from-the-connected-help-center
https://linear.app/chatwoot/issue/CW-1453/container-view-for-showing-search-input-and-result-items

app/javascript/dashboard/i18n/locale/en/conversation.json

@@ -139,6 +139,7 @@
       "PRIVATE_NOTE": "Private Note",
       "SEND": "Send",
       "CREATE": "Add Note",
+      "INSERT_READ_MORE": "Read more",
       "DISMISS_REPLY": "Dismiss reply",
       "REPLYING_TO": "Replying to:",
       "TIP_FORMAT_ICON": "Show rich text editor",

app/javascript/dashboard/i18n/locale/en/helpCenter.json

@@ -76,6 +76,9 @@
     },
     "ARTICLE_SEARCH_RESULT": {
       "UNCATEGORIZED": "Uncategorized",
+      "SEARCH_RESULTS": "Search results for %{query}",
+      "EMPTY_TEXT": "Search for articles to insert into replies.",
+      "SEARCH_LOADER": "Searching...",
       "INSERT_ARTICLE": "Insert",
       "NO_RESULT": "No articles found",
       "COPY_LINK": "Copy article link to clipboard",
@@ -426,6 +429,21 @@
         }
       }
     },
+    "ARTICLE_SEARCH": {
+      "TITLE": "Search articles",
+      "PLACEHOLDER": "Search articles",
+      "NO_RESULT": "No articles found",
+      "SEARCHING": "Searching...",
+      "SEARCH_BUTTON": "Search",
+      "INSERT_ARTICLE": "Insert link",
+      "IFRAME_ERROR": "URL is empty or invalid. Unable to display content.",
+      "OPEN_ARTICLE_SEARCH": "Insert article from Help Center",
+      "SUCCESS_ARTICLE_INSERTED": "Article inserted successfully",
+      "PREVIEW_LINK": "Preview article",
+      "CANCEL": "Close",
+      "BACK": "Back",
+      "BACK_RESULTS": "Back to results"
+    },
     "UPGRADE_PAGE": {
       "TITLE": "Help Center",
       "DESCRIPTION": "Create user-friendly self-service portals. Help your users to access the articles and get support 24/7. Upgrade your subscription to enable this feature.",