cmd: llimport

[xushiwei]

No description provided.

[fennoai]

Review: PR #704

Small, clean, well-scoped change. Adds a new dev CLI cmd/llimport/import.go that imports a Go package and prints its exported scope members, and removes an outdated usage comment in cmd/llcppdump/cppdump.go.

Assessment

• The packages.NewImporter(nil, workDir) usage matches the established pattern in cl/compile_test.go:62; license header and structure are consistent with sibling cmd/ tools.
• Argument parsing correctly handles the optional workDir with a sensible default.
• The inline usage strings are accurate; no README references these internal tools, so no docs update is needed.
• Security / Performance / Documentation: no issues found.

Optional (non-blocking)

• Error/usage output goes to stdout and returns with exit code 0. For script-friendliness, consider routing to stderr with a non-zero exit. Note this matches the pre-existing convention in cppdump.go, so it's a codebase-wide style point rather than a regression.
• scope.Names() order is unspecified; sort before printing only if the output is ever used for diffing/golden comparisons. Fine as-is for an ad-hoc inspection tool.

No blocking issues.