docs: README.md updates and initial CHANGELOG.md #45

Author: dan-obx

CHANGELOG.md

@@ -0,0 +1,25 @@
+ObjectBox Python ChangeLog
+==========================
+
+4.0.0 (2024-05-16)
+------------------
+
+### Core
+
+* ObjectBox now supports vector search ("vector database") to enable efficient similarity searches.
+  This is particularly useful for AI/ML/RAG applications, e.g. image, audio, or text similarity.
+  Other use cases include sematic search or recommendation engines.
+  See https://docs.objectbox.io/ann-vector-search for details.
+* Adjusting the version number to match the core version (4.0); we will be aligning on major versions from now on.
+
+### Python Bindings
+
+* Queries: Support for Property-based conditions and logic combinations 
+* Convenient "Store" API deprecates ObjectBox and Builder API
+* New examples added, illustrating an VectorSearch and AI/RAG application
+* Dependency flatbuffers: Updated to 24.3.50
+
+0.6.1 (and below)
+-----------------
+
+Please check https://github.com/objectbox/objectbox-python/releases for details.

README.md

@@ -2,7 +2,13 @@ ObjectBox Python API
 ====================
 [ObjectBox](https://objectbox.io) is a superfast database for objects, now also available for Python (3.4+) with a simple CRUD API.
 And because it's an embedded database, there's no setup required.
- 
+
+Its advanced vector search empowers AI for a variety of applications, including RAG AI, generative AI,
+and similarity searches. Designed for high performance, the ObjectBox database is excellent for mobile and IoT devices,
+minimizing CPU, memory, and battery usage to enhance device efficiency and sustainability.
+As an offline-first solution, ObjectBox makes sure your app reliably works offline as well as online. 
+
+
 ## Table of Contents:
 - [Getting Started](#getting-started)
    - [Model IDs and UIDs](#model-ids-and-uids)