Subject: Simplify Installation Instructions

Body:
- Updated README and include/README.md for basic installation with guide link.

README.md

@@ -49,24 +49,7 @@ Graaf is designed with the goal of simplifying graph-related tasks. It offers a
 
 # Installation
 
-The most straightforward way to use the Graaf in your project is to include it as a header-only library. Please take a
-look at the [installation guide](https://bobluppes.github.io/graaf/docs/quickstart/installation) for alternative
-installation methods.
-
-## Header-Only Library
-
-The Graaf libary can be included as a header-only library. All it requires is a compiler with **C++ 20 support**.
-
-Download the `header-only` library from our [release page](https://github.com/bobluppes/graaf/releases) and add
-the `include/graaflib` directory to your include path. You can now use Graaf in your source files:
-
-```c++
-// main.cpp
-#include <graaflib/directed_graph>
-```
-
-For more details or alternative installation methods, see
-the [installation guide](https://bobluppes.github.io/graaf/docs/quickstart/installation).
+Installing Graaf on your project is easy! Simply copy the `graaflib` directory to your project and add it to your include path. For more details or alternative installation methods, take a look at our [installation guide](https://bobluppes.github.io/graaf/docs/quickstart/installation).
 
 # How to use Graaf
 

include/README.md

@@ -1,20 +1,2 @@
 # Graaf Header-Only Installation
-Installing Graaf on your project is easy! Simply copy the `graaflib` directory to your project and add it to your include path. For more details or alternative installation methods, take a look at our [installation guide](https://bobluppes.github.io/graaf/docs/quickstart/installation).
-
-1. Copy `graaflip` to your project.
-2. Before compiling, add the directory to your include path.
-    ```bash
-    # For C compiler
-    export C_INCLUDE_PATH="/full/path/to/include/graaflib/:$C_INCLUDE_PATH"
-    # For Cpp compiler
-    export CPLUS_INCLUDE_PATH="/full/path/to/include/graaflib/:$CPLUS_INCLUDE_PATH"
-    ```
-
-    Or in CMake:
-    ```CMake
-    include_directories("graaf/src/graaflib")
-    ```
-3. Include the graaf header in your sources.
-    ```c++
-    #include <graaflib/directed_graph.h>
-    ```
+Installing Graaf on your project is easy! Simply copy the `graaflib` directory to your project and add it to your include path. For more details or alternative installation methods, take a look at our [installation guide](https://bobluppes.github.io/graaf/docs/quickstart/installation).