fix(core): wrap enterprise welcome message for small screens

[henchaves]

Description

The enterprise welcome banner was one long concatenated line after the thank-you sentence. Jupyter clips stderr instead of wrapping it, so the rest of the copy is only visible by scrolling horizontally.

Copy is unchanged. Newlines now break at phrase boundaries so each line stays under ~60 characters (the notebook screenshot clipped around ~90):

Thank you for using Giskard open-source! 🐢 🙏
Giskard Enterprise adds deeper agent scans, audit reports
with remediation guidance, test review interfaces
for root-cause analysis & human feedback integration,
and team collaboration — with flexible pricing.
Learn more: https://giskard.ai

Related Issue

Follow-up to #2784.

Type of Change

• 📚 Examples / docs / tutorials / dependencies update
• 🔧 Bug fix (non-breaking change which fixes an issue)
• 🥂 Improvement (non-breaking change which improves an existing feature)
• 🚀 New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)
• 🔐 Security fix

Coding agents

Autonomous agents with no human in the loop must read AUTONOMOUS.md before opening a PR.

PR title: agent-opened PRs must end the title with 🤖🤖🤖🤖 (exactly four robot emojis). Do not omit — that suffix is how the expedited agent PR workflow picks up the PR.

Checklist

• I've read the CODE_OF_CONDUCT.md document.
• I've read the CONTRIBUTING.md guide.
• I've written tests for all new methods and classes that I created.
• I've written the docstring in NumPy format for all the methods and classes that I created or modified.
• I've updated the uv.lock running uv lock (only applicable when pyproject.toml has been
  modified)