Create compiling.md

Author: TimGoTheCreator

docs/compiling.md

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+# Compilling NEXT
+
+NEXT uses a simple CMake system to build,
+To build (assuming you're in project root) you need to
+```bash
+mkdir build
+cd build
+cmake ..
+cmake --build .
+cd ..
+```
+
+Now, you have access to the compiled binary! (next) / (next.exe)