⬇️ fix: JSON LibreChat Imports (#2897)

* chore: remove unused code

* refactor: Update NewChatButtonIcon component to use JSX syntax

The NewChatButtonIcon component in the Nav folder has been updated to use JSX syntax instead of calling the Icon function directly. This change improves code readability and maintainability.

* remove use memo

* refactor: allow passing `select` to messages db query

* fix: initial fix for non-recursive messages

* ci: first pass, importers test rewrite

* fix(groupConversationsByDate): handle edge case of conversation.updatedAt being null

* fix: correctly handle non-recursive uploads

* feat: imports non-recursive conversations with branches correctly

* feat: support retaining original options on import

* refactor: Allow `messageTree` field for Import of non-recursive conversations

api/server/utils/import/__data__/librechat-linear.json

@@ -0,0 +1,40 @@
+{
+  "conversationId": "4c9e1402-f746-479d-8a18-2dfab1bf750f",
+  "endpoint": "azureOpenAI",
+  "title": "Adventure Across Time and Space",
+  "exportAt": "20:33:31 GMT-0400 (Eastern Daylight Time)",
+  "branches": false,
+  "recursive": false,
+  "messages": [
+    {
+      "messageId": "ed3fdaaa-e174-4d70-89a9-b06e70939723",
+      "conversationId": "4c9e1402-f746-479d-8a18-2dfab1bf750f",
+      "createdAt": "2024-05-29T00:33:03.661Z",
+      "endpoint": "azureOpenAI",
+      "error": false,
+      "isCreatedByUser": true,
+      "isEdited": false,
+      "model": null,
+      "parentMessageId": null,
+      "sender": "user",
+      "text": "tell me a long story",
+      "unfinished": false,
+      "updatedAt": "2024-05-29T00:33:03.661Z"
+    },
+    {
+      "messageId": "113b8336-4b19-4f91-8eed-741b3dc2940e",
+      "conversationId": "4c9e1402-f746-479d-8a18-2dfab1bf750f",
+      "createdAt": "2024-05-29T00:33:03.661Z",
+      "endpoint": "azureOpenAI",
+      "error": false,
+      "isCreatedByUser": false,
+      "isEdited": false,
+      "model": "gpt-4o",
+      "parentMessageId": "ed3fdaaa-e174-4d70-89a9-b06e70939723",
+      "sender": "GPT-4",
+      "text": "Of course! Here’s a detailed and engaging story:\n\n---\n\n### The Legend of Eldoria\n\nNestled between towering mountains and dense, ancient forests was the enigmatic kingdom of Eldoria. This realm, clo aked in perpetual twilight, was the stuff of legends. It was said that the land was blessed by the gods and guarded by mythical creatures. Eldoria was a place where magic and realism intertwined seamlessly, creating a land of beauty, wonder, and peril.\n\nIn the heart of this kingdom lay the grand city of Lumina, known",
+      "unfinished": false,
+      "updatedAt": "2024-05-29T00:33:03.661Z"
+    }
+  ]
+}