feat(foxi): add LLAR formula

[MeteorsLiu]

Add an LLAR Formula for houseroad/foxi at Conan source commit bd6feb6d0d3fc903df42b4feb82a602a5fcb1fd5.

The implementation includes:

• Carry the verified Conan CMake patch and install the foxi headers and libraries into the LLAR output.
• Preserve the source-backed static, shared, and module targets without adding unverified dependencies.
• Publish installed link metadata and compile an independent C consumer against the result.
• Validate fresh and cache-hit builds with the exact source commit on Darwin arm64.

The upstream repository has no release tags, so the Formula uses the immutable Conan source commit explicitly and avoids inventing a version comparator.

Closes #110

[fennoai]

FennoAI Review

New LLAR recipe for houseroad/foxi. The overall structure is solid — commit pinning with a rationale comment, _llar_-prefixed scratch patch files, --forward --batch patch application, cache-hit-safe onTest flag derivation, and appropriate file permissions. Nice cross-platform touch setting both LD_LIBRARY_PATH and DYLD_LIBRARY_PATH.

One correctness issue is worth fixing (inline). The rest are consistency/documentation notes.

Consistency with existing recipes

• Filename: existing recipes use PascalCase (Cglm_llar.gox, Jsonc_llar.gox, Zlib_llar.gox); this file is lowercase foxi_llar.gox. Consider renaming to Foxi_llar.gox, and confirm recipe discovery does not depend on the capitalized name.
• Indentation: this recipe uses 4-space indentation while all existing recipes use tabs (gofmt style). Consider converting to tabs.
• versions.json uses 2-space indentation; siblings use tabs.

Documentation (relative to the well-commented cglm/json-c recipes)

• No comment explains the two patches (fix-conflicting-types.patch alters the public onnxInitGraph/onnxWaitEventFor ABI; cmake.patch changes install layout) or the CMAKE_POLICY_VERSION_MINIMUM=3.5 define. A short rationale for each would help future maintainers.
• The onTest flags are deliberately re-derived from installDir so the test works on a cache hit (onBuild skipped). The cglm/json-c recipes document this explicitly; a one-line comment here would match convention.

Minor

• os.setenv "LD_LIBRARY_PATH" / "DYLD_LIBRARY_PATH" overwrite any inherited value rather than prepending installDir/lib:$LD_LIBRARY_PATH. Low impact since it runs only in onTest, but prepending is safer.

[fennoai]

The failure branch prints an error but returns 0 (success), so onTest (which checks the binary's exit code via lastErr!) can never fail even when onnxifi_load fails — the test becomes a no-op. onnxifi_load returns non-zero on success per upstream onnxifi_loader.h, so !ret is correctly the failure path; only the return code is wrong.

Suggested change

	return 0;
	if (!ret) {
	fprintf(stderr, "Cannot load onnxifi lib\n");
	return 1;
	}