feat: update README.md

README.md

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+
+![Logo](https://git.lowearthorbit.de/attachments/89a7215a-33ac-4284-a3c5-5647167802c3)
+
+
 # curtle
 
-Curtle is a smart turtle that helps you with math tasks.
+curtle is a simple open source cross platform math library for C.
+## Roadmap
+The goal of curtle is to provide an easy to use and easy to integrate math library. If you are interested in specific features please reach out to me!
+
+- add much math tooling
+- provide easy install via package managers etc.
+
+
+## Features
+
+- Basic operations on 2D Vectors
+- Basic operations on 3D Vectors
+
+
+## Installation
+
+Clone the repository:
+```
+git clone https://git.lowearthorbit.de/lowearthorbit/curtle.git
+cd curtle
+```
+You can build and install the library using cmake:
+```
+mkdir build && cd build
+cmake ..
+sudo cmake --install .
+```
+## Usage/Examples
+
+Once installed, you can use curtle with CMake:
+
+```CMake
+find_package(curtle REQUIRED)
+
+add_executable(myapp main.c)
+target_link_libraries(myapp PRIVATE curtle::curtle)
+```
+
+Example in C
+```C
+#include "curtle/curtle.h"
+
+int main(void) {
+    struct vec2 a = { 1.0, 1.0 };
+    printf("%f", vec2_len(a)); // Prints sqrt(2)
+}
+```
+## Authors
+
+- [@lowearthorbit](https://git.lowearthorbit.de/lowearthorbit)
+