[WIP] Project#15: GGUF Reader in OpenVINO for direct GGUF Execution

[shahkarnav115-beep]

Description

• Added gguf_reader_v2.cpp and gguf_reader_v2.hpp to src/cpp/src/gguf_utils/.
• Added llama.cpp (@ravi9's branch[dev_backend_openvino]) in thirdparty

@ravi9 - Opening this as a WIP to get some feedback on the core C++ implementation and structure. Unit tests (gguf_reader_v2_test.cpp) are currently being finalized locally and will be pushed in a subsequent commit once the base logic is reviewed.

Checklist:

• This PR follows GenAI Contributing guidelines.
• Tests have been updated or added to cover the new code.
• This PR fully addresses the ticket.
• I have made corresponding changes to the documentation.

[shahkarnav115-beep]

@ravi9 some of the work for the build is left to be done. Will push the commit shortly.

[as-suvorov]

@shahkarnav115-beep Converting PR to draft as description states it's WIP

[shahkarnav115-beep]

This is the complete integration of llama.cpp ("dev_backend_openvino" - branch) in openvino.genai as a submodule (static library).

I have implemented the minimal architecture (skeleton) of GGUFReaderV2 in gguf_reader_v2.cpp and its .hpp. To verify that it successfully calls the APIs from the submodule, I have also added a minimal C++ regression test in gguf_reader_v2_test.cpp.

Locally, I have built all the required components and tested them, and this minimal scaffold is compiling and working perfectly on my system. As part of my GSoC 2026 preparation, I would be extremely grateful to get your reviews on this initial architectural integration.

cc: @ravi9, @cavusmustafa

[shahkarnav115-beep]

Link to headers file for submodule's (dev_backend_openvino branch): ravi9/llama.cpp#55