style: adjust icon scale, favicon, azure icon; chore: convert files to TSX; ci: unit tests for generation buttons (#987)

* some jsx to tsx and added 3 new test

* test(stop)

* new librechat and azure icon, small fix

* fix(tsc error)

* fix(tsc error) Endpoint Item

client/src/components/Nav/NewChat.tsx

@@ -0,0 +1,37 @@
+import React from 'react';
+import { useLocalize, useConversation } from '~/hooks';
+
+export default function NewChat() {
+  const { newConversation } = useConversation();
+  const localize = useLocalize();
+
+  const clickHandler = () => {
+    // dispatch(setInputValue(''));
+    // dispatch(setQuery(''));
+    newConversation();
+  };
+
+  return (
+    <a
+      onClick={clickHandler}
+      className="flex h-11 flex-shrink-0 flex-grow cursor-pointer items-center gap-3 rounded-md border border-white/20 px-3 py-3 text-sm text-white transition-colors duration-200 hover:bg-gray-500/10"
+    >
+      <svg
+        stroke="currentColor"
+        fill="none"
+        strokeWidth="2"
+        viewBox="0 0 24 24"
+        strokeLinecap="round"
+        strokeLinejoin="round"
+        className="h-4 w-4"
+        height="1em"
+        width="1em"
+        xmlns="http://www.w3.org/2000/svg"
+      >
+        <line x1="12" y1="5" x2="12" y2="19" />
+        <line x1="5" y1="12" x2="19" y2="12" />
+      </svg>
+      {localize('com_ui_new_chat')}
+    </a>
+  );
+}