feat: basic chat implementation completed (#13023)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **New Features**
* Introduced a new chat list view with improved grouping of messages by
date and support for rich markdown rendering, including math
expressions.
* Added support for displaying user message attachments and hints within
the chat interface.

* **Improvements**
* Enhanced chat cell designs for user, assistant, and system messages,
providing clearer layouts and better text rendering.
* Streamlined chat message streaming with incremental markdown updates
and improved scrolling behavior.
* Updated chat view models to include timestamps and refined message
typing.

* **Bug Fixes**
* Improved handling of streaming responses and error reporting with more
accurate timestamps.

* **Refactor**
* Replaced the legacy table-based chat UI with a modern list-based
implementation.
* Simplified and unified chat cell view models and cell rendering logic.

* **Chores**
* Updated and added several third-party dependencies to support new UI
components and markdown features.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/apps/ios/App/App.xcworkspace/xcshareddata/swiftpm/Package.resolved

@@ -12,10 +12,46 @@
     {
       "identity" : "eventsource",
       "kind" : "remoteSourceControl",
-      "location" : "https://github.com/loopwork-ai/eventsource.git",
+      "location" : "https://github.com/Recouse/EventSource",
       "state" : {
-        "revision" : "07957602bb99a5355c810187e66e6ce378a1057d",
-        "version" : "1.1.1"
+        "revision" : "d783b1cf60599dbcec6396c55a6bab33a1c92dc3",
+        "version" : "0.1.4"
+      }
+    },
+    {
+      "identity" : "listviewkit",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Lakr233/ListViewKit",
+      "state" : {
+        "revision" : "a4372d7f90c846d834c1f1575d1af0050d70fa0f",
+        "version" : "1.1.6"
+      }
+    },
+    {
+      "identity" : "litext",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Lakr233/Litext",
+      "state" : {
+        "revision" : "c37f3ab5826659854311e20d6c3942d4905b00b6",
+        "version" : "0.5.0"
+      }
+    },
+    {
+      "identity" : "lrucache",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/nicklockwood/LRUCache",
+      "state" : {
+        "revision" : "542f0449556327415409ededc9c43a4bd0a397dc",
+        "version" : "1.0.7"
+      }
+    },
+    {
+      "identity" : "markdownview",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Lakr233/MarkdownView",
+      "state" : {
+        "revision" : "29a9da19d6dc21af4e629c423961b0f453ffe192",
+        "version" : "2.3.8"
       }
     },
     {
@@ -27,6 +63,33 @@
         "version" : "5.7.1"
       }
     },
+    {
+      "identity" : "splash",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Lakr233/Splash",
+      "state" : {
+        "revision" : "4d997712fe07f75695aacdf287aeb3b1f2c6ab88",
+        "version" : "0.17.0"
+      }
+    },
+    {
+      "identity" : "springinterpolation",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Lakr233/SpringInterpolation",
+      "state" : {
+        "revision" : "f9ae95ece5d6b7cdceafd4381f1d5f0f9494e5d2",
+        "version" : "1.3.1"
+      }
+    },
+    {
+      "identity" : "swift-cmark",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/swiftlang/swift-cmark",
+      "state" : {
+        "revision" : "b022b08312decdc46585e0b3440d97f6f22ef703",
+        "version" : "0.6.0"
+      }
+    },
     {
       "identity" : "swift-collections",
       "kind" : "remoteSourceControl",
@@ -45,6 +108,15 @@
         "version" : "6.2.0"
       }
     },
+    {
+      "identity" : "swiftmath",
+      "kind" : "remoteSourceControl",
+      "location" : "https://github.com/Lakr233/SwiftMath",
+      "state" : {
+        "revision" : "cfd646dcac0c5553e21ebf1ee05f9078277518bc",
+        "version" : "1.7.2"
+      }
+    },
     {
       "identity" : "then",
       "kind" : "remoteSourceControl",