Update documentation to specify C++23 compiler requirements

- Change C++17 to C++23 compatible compiler requirements
- Update compiler versions: GCC 11+, Clang 12+, MSVC 2022+
- Update SYCL backend documentation standard reference

Ticket: MBA-133
Co-Authored-By: Jaime Mizrachi <[email protected]>

Author: devin-ai-integration[bot]

.github/copilot-instructions.md

@@ -16,7 +16,7 @@ llama.cpp is a large-scale C/C++ project for efficient LLM (Large Language Model
 
 ### Prerequisites
 - CMake 3.14+ (primary build system)
-- C++17 compatible compiler (GCC 13.3+, Clang, MSVC)
+- C++23 compatible compiler (GCC 11+, Clang 12+, MSVC 2022+)
 - Optional: ccache for faster compilation
 
 ### Basic Build (CPU-only)
@@ -229,7 +229,7 @@ Primary tools:
 
 ### Required Tools
 - CMake 3.14+ (install via system package manager)
-- Modern C++ compiler with C++17 support
+- Modern C++ compiler with C++23 support
 - Git (for submodule management)
 - Python 3.9+ with virtual environment (`.venv` is provided)
 

docs/backend/SYCL.md

@@ -15,7 +15,7 @@
 
 ## Background
 
-**SYCL** is a high-level parallel programming model designed to improve developers productivity writing code across various hardware accelerators such as CPUs, GPUs, and FPGAs. It is a single-source language designed for heterogeneous computing and based on standard C++17.
+**SYCL** is a high-level parallel programming model designed to improve developers productivity writing code across various hardware accelerators such as CPUs, GPUs, and FPGAs. It is a single-source language designed for heterogeneous computing and based on standard C++23.
 
 **oneAPI** is an open ecosystem and a standard-based specification, supporting multiple architectures including but not limited to Intel CPUs, GPUs and FPGAs. The key components of the oneAPI ecosystem include: