[thilinarmtb]

Description

Use the vendor CMake package to find DPCPP.

Todo

• Figure out how to handle OCCA_DPCPP_COMPILER_FLAGS when using vendor packages
• Should we support add_sycl_to_target() command?

[Copilot]

Pull Request Overview

Switch FindDPCPP.cmake to prefer the vendor package (IntelSYCL) and align variables from SYCL_* to DPCPP_*.

• Add find_package(IntelSYCL QUIET) with mapping to DPCPP_* variables
• Rename SYCL_* variables to DPCPP_* and update CMakeLists messages accordingly

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
cmake/FindDPCPP.cmake	Introduces vendor-based discovery (IntelSYCL), renames variables, and adjusts include/library handling and flags.
CMakeLists.txt	Updates log messages to use the new DPCPP_* variables.

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[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

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[thilinarmtb]

@kris-rowe : I think this is ready to review. Please let me know if you have other comments.
I can add support for add_sycl_to_target() in a separate PR if that is required.