docs: update files_to_copy examples to newline separator

[harris1111]

Summary

• Update documentation examples to use newline-separated files_to_copy
• Aligns with orochi-network/actions parser change

Depends on: orochi-network/actions PR

[SangTran-127]

Orochi Standards Review

Issues Found

1. [MEDIUM] New file README-2.md instead of updating existing README.md

The PR creates a brand new README-2.md (292 lines) alongside the existing README.md. This is confusing — which one is the source of truth? If this is a full replacement, update README.md directly. If it's a draft, name it clearly (e.g., README-draft.md) and include a follow-up plan.

2. [LOW] docs/dockerfile-generator.md missing trailing newline

The file ends without a trailing newline — minor but triggers lint warnings in most editors.

What Looks Good

• Comprehensive documentation — the README-2.md and docs/dockerfile-generator.md are well-structured with tables, examples, and clear sections
• Examples updated to use the new files_to_copy YAML block scalar format
• GitHub Actions usage documented with both composite action and reusable workflow examples
• Template configuration table clearly shows builder vs runner defaults

Notes

• Commit title docs: update files_to_copy examples to newline separator uses conventional format — good
• Consider merging README-2.md content into README.md before shipping

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Reviewed against Orochi standards: code-review-standards.md, git-model.md

[chiro-hiro]

The documentation content itself is accurate and well-written — the files_to_copy newline format is correctly shown in all examples, no sensitive values are exposed, and the overall structure is a clear improvement.

Two things to fix before this can be approved:

1. README-2.md must replace README.md, not sit alongside it. GitHub serves README.md as the repo homepage — README-2.md won't be seen. Please rename or copy the content into README.md and delete README-2.md. This was flagged by SangTran-127 as well.

2. docs/dockerfile-generator.md is missing a trailing newline (visible as \ No newline at end of file in the diff). Please add one.

Once these are addressed this is good to merge.