doc: add readme for glassy library

Add readme file for glassy library.

sources/example_glassy/readme.md

@@ -0,0 +1,47 @@
+# Glassy Library
+
+An experiment of creating small library wrapper for OpenSSL functions using modern C++ features and using externallibraries providing useful types and abstractions.
+
+## Project Structure
+
+```
+.
+├── application/     # Application code
+├── library/         # Core library implementation
+│   └── sources/     # Library source files
+├── tests/           # Test suite
+└── third_party/     # External dependencies
+```
+
+## Dependencies
+
+- OpenSSL
+- GSL (Guidelines Support Library)
+- Outcome library
+
+## Features
+
+- Big number operations with OpenSSL integration
+- ASN.1 integer handling
+- Memory management helpers
+- Numeric conversions utilities
+- Not-null concepts implementation
+- Error handling using Outcome library
+
+
+
+## Components
+
+### Library
+
+The core library provides several key components:
+
+- `BigNum`: A wrapper around OpenSSL's BIGNUM functionality
+- `ASN1Integer`: ASN.1 integer implementation
+- `MemoryHelpers`: Memory management utilities
+- `NumericConversions`: Safe numeric conversion utilities
+- `NotNullConcepts`: Implementation of not-null pointer concepts
+
+### Tests
+
+The project includes a comprehensive test suite to ensure reliability and correctness of the implementation.