fix(ixgo): export comparator classfile package

[MeteorsLiu]

No description provided.

[fennoai]

Review: fix(ixgo): export comparator classfile package

No blocking issues. The change correctly registers github.com/goplus/llar/cmp with the ixgo interpreter so .gox comparators loaded outside a Go module can resolve their imports from the in-memory registry instead of falling back to on-disk (go/build) resolution, which fails without a module context. The new TestLoadComparator_OutsideModule exercises exactly this path via t.Chdir(t.TempDir()), and I verified the assertion matches the semver-based CJSON_cmp.gox testdata.

Verified:

• Generated export.go matches the existing formula/export.go pattern and declares all exported symbols of cmp (CmpApp, Gopt_CmpApp_Main, GopPackage). Deps correctly lists only mod/module (the sole import of cmp/cmp.go).
• pkgs.go blank import is alphabetized within the llar group; //go:generate directive placed beside the sibling formula directive.
• go build ./internal/ixgo/... succeeds. filepath.Abs(...) is captured before t.Chdir, so the path resolution is correct.

Not verified: go test ./internal/modules/ could not run to completion in the sandbox due to a pre-existing ixgo link error (math/rand/v2.globalRand) unrelated to this PR.

The inline comments below are minor, optional polish only.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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