feat(import): add progress bar and English CLI output

[m0Nst3r873]

Summary

• Add listr2 progress bar for structured multi-step progress display in import commands
• Translate all user-facing Chinese strings to English (~80 strings across 9 files)

Progress bar

Import commands now show structured step-by-step progress with timers:

✔ Import remote repository [12s]
    Repository: https://github.com/org/repo.git

✔ Extract learning from MR [3s]
✔ Incremental teamwiki update [8s]
    Updating tgit__team__repo...
✔ Push changes via MR [2s]

Covered commands: --from-repo, --from-repo-list, --from-mr, --from-org

English output

All user-visible log/spinner/error messages translated to English. Preserved in Chinese:

• AI prompts (sent to LLM)
• Generated document content (G-documents, gaps)
• Code comments

Test plan

• 129 test files, 1582 tests passing
• TypeScript type check clean
• listr2 auto-degrades to simple renderer in non-TTY (CI) environments

🤖 Generated with Claude Code