docs: add logo to readme (#80)

* Add logo

* Try no separator

* Remove note

Author: kafkas

README.md

@@ -1,15 +1,17 @@
+<div align="center">
+  <img src="images/logo.png" width="240px" alt="header" />
+</div>
+
 <h1 align="center">
   <a href="https://kafkas.github.io/firewalk">
-    Firewalk
+    firewalk
   </a>
 </h1>
 
 <p align="center">
   A light, fast, and memory-efficient collection traversal library for Firestore and Node.js.
 </p>
 
----
-
 <p align="center">
     <a href="https://github.com/kafkas/firewalk/blob/main/LICENSE">
     <img src="https://img.shields.io/badge/license-MIT-blue.svg" alt="Firewalk is released under the MIT license." /></a>
@@ -31,9 +33,6 @@ When you have millions of documents in a collection and you need to make changes
 
 Firewalk is an extremely light and well-typed library that is useful in a variety of scenarios. You can use it in database migration scripts (e.g. when you need to add a new field to all docs) or a scheduled Cloud Function that needs to check every doc in a collection periodically or even a locally run script that retrieves some data from a collection.
 
-**Note**: This library was previously known as Firecode. We're currently in the process of porting over the documentation from the
-previous site.
-
 [**Read the introductory blog post ▸**](https://anarkafkas.medium.com/traversing-firestore-collections-efficiently-6e43cea1eefd)
 
 [**View the full documentation (docs) ▸**](https://kafkas.github.io/firewalk)