feat(checker): add project FFI import shorthand

[akonwi]

Summary

• map use go:<ard-package>/ffi to each package's canonical Go module path
• preserve package context during whole-program Go import scanning, including Ard dependencies
• document the stable project-name shorthand and nested FFI imports

Testing

• cd compiler && go test ./... -count=1
• cd compiler && gopls check checker/module_resolver.go checker/go_import_scan.go checker/checker.go checker/go_packages_resolver_test.go go/project_ffi_shorthand_test.go
• cd website && npm run build
• checked rewritten shorthand imports in sibling ard-cloudflare, sql, and cooper projects
• checked and built cooper/examples/quickstart.ard with cooper as a path dependency

Notes

Existing canonical Go import paths remain supported. Project-local FFI without a source go.mod remains tracked separately in #491.

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Project	Deployment	Actions	Updated
ard-lang-dev	Ready	Preview	Sep 8, 2026 9:00pm UTC