Revise README with key features image

Updated README to include key features image and remove old description.

Author: PAXECT-Interface

README.md

@@ -4,10 +4,7 @@
 [![CodeQL](https://github.com/PAXECT-Interface/PAXECT---Core/actions/workflows/codeql.yml/badge.svg)](../../actions)
 [![Discussions](https://img.shields.io/github/discussions/PAXECT-Interface/PAXECT---Core)](../../discussions)
 
-PAXECT is an open-source platform for **deterministic** and **secure** transport/archiving of technical data
-(files, streams, logs, telemetry, updates) in multi-platform environments. It delivers a stable container format
-**`.freq`**, a **plug-and-play** extension model (encryption, language bindings, performance tuning), and a **privacy-first**
-architecture (no telemetry, no external data flows). **Zero AI.**
+![PAXECT Key Features Block](docs/assets/paxect_block1_orange_midblack_FINAL.svg)
 
 > **Launch period (free):** All features (including Enterprise/Pro) are free until **2026-04-01**.  
 > The Core will remain open-source (Apache-2.0) and maintained thereafter.