add initial installation and running tests document

doc/installation_and_test.md

@@ -0,0 +1,27 @@
+# Installation & Running Tests
+## 1. Requirements
+- Implemented in `C++20` and only uses C++ Standard Library.
+- `CMake 3.12` or higher.
+- **GNU/Linux:** `GCC 10.1` or higher, `Clang 11` or higher.
+- **Windows:** `Visual Studio 2019 version 16.11.14` or higher.
+- **macOS:** `Xcode 14.3` or higher.
+
+## 2. Installation
+To use the library, simply clone the repository or [download](../include/bytepack/bytepack.hpp) the `bytepack.hpp` file and include it in your project.
+```bash
+git clone https://github.com/farukeryilmaz/bytepack.git
+```
+Include the library in your C++ project:
+```cpp
+#include "bytepack/bytepack.hpp"
+```
+
+## 3. Building and Testing
+Clone the repository with submodule `Catch2 v2.x` to run tests:
+```bash
+git clone --recursive https://github.com/farukeryilmaz/bytepack.git
+```
+> If you cloned non-recursively previously, use `git submodule update --init` to clone the necessary submodules.
+
+### 3.1 Visual Studio
+(incomplete)