Build instructions unclear it make confusion between CMake and Autotools

[deepanshusaini8683]

Hi Deepanshu this side,

While trying to build MUSIC, I initially attempted to use CMake:

mkdir build
cd build
cmake ..

This failed because the repository does not contain a CMakeLists.txt.

After exploring the repository, I found that the correct build process uses Autotools:

./autogen.sh
./configure
make

Suggestion:
It would be helpful to add a "Quick Start" section in the README with clear build steps and required dependencies (e.g., build-essential, autoconf, automake, libtool, MPI).

This would make onboarding easier for new contributors.

Thanks!