Update README with detailed library description

Expanded the description to provide more details about the library's features and use cases.

Author: artem-v

README.md

@@ -1,2 +1,3 @@
-# scalecube-metrics
-High-performance KPI/telemetry library built on Agrona Counters and HdrHistograms for ultra-low-latency metrics
+# ScaleCube metrics and telemetry
+
+High-performance KPI and telemetry library for Java, designed for ultra-low-latency and precise metrics. Built on Agrona Counters and HdrHistograms, it supports both real-time monitoring and historical data captures. The library is ideal for systems that require fine-grained performance insights, high-frequency metrics, and minimal runtime overhead. Lightweight and thread-safe, it can be integrated into performance-critical applications such as trading platforms, messaging systems, or any low-latency environment.