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Signed-off-by: Emmanuel Ferdman <emmanuelferdman@gmail.com>

Adds a note explaining that default CMake versions on systems like
Ubuntu 22.04 LTS might not support newer CUDA dialects (e.g., CUDA 20),
leading to specific build errors.

Recommends installing a newer CMake via the Kitware APT repository
as a resolution. This helps users troubleshoot errors like:
"Target ... requires the language dialect 'CUDA20', but CMake does not know the compile flags..."

this  is a issue in your install tutorial

    * Consolidate the installation section, as it's currently too cluttered
    * Move the Multi-GPU section to the top-level structure
    * Add a **detailed** tutorial on registering extra GPU memory with Marlin