docs: add import command usage

[leno23]

Summary

• add lms import <file path> to the README command list
• document importing local model files and the default move behavior
• include examples for --copy, --hard-link, --symbolic-link, --user-repo, --yes, and --dry-run

Closes #554

Tests

• README import docs assertions against src/subcommands/importCmd.ts
• git diff --check
• npx prettier --check README.md

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[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Avoid documenting --yes --dry-run as unattended

For a fresh profile using the default move mode, this documented unattended preview can still block and change local state: importCmd.action calls warnAboutMove(logger, yes, ...) before the dry-run branch, and warnAboutMove still calls confirm(...) even when yes is true; resolveModelsFolderPath also creates the models folder before --dry-run is checked. Users following this README example in CI or scripts can hang on the first-run move warning instead of getting a non-interactive preview, so the docs need to avoid this claim/example unless the implementation is changed.

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