docs: Add research purpose notice to README

Signed-off-by: Taras Drozdovskyi <t.drozdovsky@samsung.com>

Author: tdrozdovsky

README.md

@@ -20,9 +20,23 @@
 
 ## 1. Introduction
 The `mTower` is a new Trusted Execution Environment (TEE) specially designed
-to protect size-constrained IoT devices based on Cortex-m23 MCU. Usage mTower
-pre-embedded into the microcontroller, a module developer can use a simple SDK
-that based on Global Platform API standards to add security to their solution.
+to protect size-constrained IoT devices based on Cortex-M23 and RISC-V MCUs.
+Usage mTower pre-embedded into the microcontroller, a module developer can use
+a simple SDK that based on Global Platform API standards to add security to
+their solution.
+
+> **Important Notice:** This project is primarily created for **research purposes**
+> to explore security systems and software solutions for ARM and RISC-V
+> microcontrollers. The project is currently in **active development stage**.
+>
+> **Security research and vulnerability analysis are welcome:**
+> - Security analysis and vulnerability discovery are highly encouraged
+> - Reports of vulnerabilities and suggestions for fixes are greatly appreciated
+> - Contributions to security improvements are welcome
+>
+> **Disclaimer:** The code is provided "as is" without any warranties or obligations.
+> Users assume all risks associated with using this software. The project is
+> intended for research, educational, and experimental purposes.
 
 ---
 ## 2. License