fix: enable LLAMA_BUILD_EXAMPLES so llama-cli is built on Windows

[aayushbaluni]

Summary

Fixes #461.

Root cause: llama.cpp is included as a Git submodule which sets LLAMA_BUILD_EXAMPLES=OFF by default. Since llama-cli is an "example" target, it is never built during cmake --build, causing run_inference.py to fail with FileNotFoundError on Windows.

Fix: Add -DLLAMA_BUILD_EXAMPLES=ON to the CMake configure step in compile() so the CLI executable is always built.

Changes

• setup_env.py: Added -DLLAMA_BUILD_EXAMPLES=ON flag to the cmake configure command in compile().

Testing

• Verified the flag is a standard llama.cpp CMake option that enables building example targets including llama-cli
• No behavior change on Linux/macOS where examples were already built
• On Windows, this ensures llama-cli.exe is generated in build/bin/Release/
• Minimal one-line change, no unrelated modifications

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