Add CEO Tweet Storm examples to CEO Shadow handbook

Why is this change being made?

The CEO shadow handbook explains how to create a tweet storm for the CEO. This MR adds an example tweet storm, including the Twitter URL and document source. There are potentially more tweet storms to document in the future.

In addition to documenting the tweet storm examples as future reference, they are also the SSoT for linking them in community discussions. The server runtime and remote development environments Twitter thread is a great resource, shared again recently in https://twitter.com/dnsmichi/status/1545506274284273664 - having the URL in the handbook avoids searching Twitter.

Author Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added.
• Assign reviewers for this MR to the correct Directly Responsible Individual/s (DRI)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the Maintained by section on the page being edited
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies
• If the changes affect team members, or warrant an announcement in another way, please consider posting an update in #whats-happening-at-gitlab linking to this MR
  • If this is a change that directly impacts the majority of global team members, it should be a candidate for #company-fyi. Please work with internal communications and check the handbook for examples.

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