docs: AUT-1545 add lifecycle marker files

[svcnemo-autobot]

Background

Exercise the requested fork-to-upstream Git lifecycle.

What changed

Added root-level hello.md and world.md, each containing the requested marker.

Details

flowchart LR
  H[hello.md] --> W[world.md] --> C[close without merge]

Loading

Both requested commits are now published. The PR will be closed without merging or deleting its branch after the required continuation.

Tested

• Verified both files contain exactly one requested line with a trailing newline.
• Inspected each staged diff.
• uv run pre-commit run --all-files remains unavailable because uv is absent from the mandated Ubuntu bootstrap workstation.

[copy-pr-bot]

This pull request requires additional validation before any workflows can run on NVIDIA's runners.

Pull request vetters can view their responsibilities here.

Contributors can view more details about this message here.

[svcnvidia-nemo-ci]

/ok to test 6d73a1b