docs: Update nico-core architecture diagram

[Matthias247]

Related issues

Update the diagram to reflect the latest state of the codebase

Type of Change

• Add - New feature or capability
• Change - Changes in existing functionality
• Fix - Bug fixes
• Remove - Removed features or deprecated functionality
• Internal - Internal changes (refactoring, tests, docs, etc.)

Breaking Changes

• This PR contains breaking changes

Testing

• Unit tests added/updated
• Integration tests added/updated
• Manual testing performed
• No testing required (docs, internal refactor, etc.)

Additional Notes

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📥 Commits

Reviewing files that changed from the base of the PR and between 4470228 and a897449.

⛔ Files ignored due to path filters (1)

• docs/static/nico-core.png is excluded by !**/*.png

📒 Files selected for processing (1)

• docs/static/nico-core.drawio

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Summary by CodeRabbit

• Documentation
  • Updated the architecture diagram layout framing and visual spacing.
  • Refreshed styling for the “NVLink Logical Partitions” and “NVLink Monitor” nodes with a new green theme.
  • Removed outdated status indicators and added a new “VPC Prefixes” node with updated geometry for clearer presentation.

Walkthrough

The Draw.io architecture diagram was updated with new layout offsets, green styling for NVLink nodes, and a VPC Prefixes node replacing the previous status nodes.

Changes

Architecture diagram updates

Layer / File(s)	Summary
Diagram layout and node updates docs/static/nico-core.drawio	The diagram offsets were adjusted, NVLink nodes were restyled from orange to green, and the previous status nodes were replaced with VPC Prefixes.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title accurately summarizes the main change: updating the nico-core architecture diagram.
Description check	✅ Passed	The description is clearly related to the diagram update and matches the stated PR objective.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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