Build prevent stale references

[willbonde]

• Stale references were possible on macOS; change to prefer Unix-style libraries first
• Fallback to unpack if table.unpack is not available

[gemini-code-assist]

Code Review

This pull request introduces macOS-specific library search path preferences in CMake and improves Lua compatibility in the CLI prelude by providing a fallback for table.unpack. The review feedback suggests a safer check for CMAKE_FIND_FRAMEWORK in CMake to avoid overwriting variables defined in toolchain files or parent scopes.

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[gemini-code-assist]

Using NOT DEFINED CACHE{CMAKE_FIND_FRAMEWORK} only checks if the variable is defined in the CMake cache. If a toolchain file or a parent scope defines CMAKE_FIND_FRAMEWORK as a normal variable, this check will evaluate to true and overwrite that setting with LAST.

Using NOT DEFINED CMAKE_FIND_FRAMEWORK is safer and more robust as it respects both cache overrides and normal variable overrides (e.g., from toolchain files or parent scopes).

if(APPLE AND NOT DEFINED CMAKE_FIND_FRAMEWORK)