Update/screenshots

[jeffpaul]

What?

This PR updates and adds screenshots/casts as we weren't quite current on the features/enhancements in the plugin. This gets us current across those, though some of the shots/casts are a bit dated to current UI/UX and could use another round of updates there but didn't want to delay getting these changes into the plugin.

Copilot summary

This pull request updates the Screenshots section in readme.txt to provide clearer, more organized, and feature-focused descriptions of the plugin's capabilities. The new list groups screenshots by feature and experiment, making it easier for users to understand the available functionalities and their context.

Screenshot Section Improvements:

• Reorganized the screenshot descriptions to group related features together, such as Image Generation, Editor Experiments, Dashboard Widgets, and Admin Experiments.
• Expanded and clarified descriptions to specify the feature demonstrated in each screenshot, improving discoverability and context for users.
• Added new screenshots to cover additional features, such as bulk alt text generation, content classification, content resizing, meta description generation, and key generation security.
• Updated existing screenshot descriptions to reflect the latest UI and feature set, ensuring accuracy and relevance.

Why?

How?

Use of AI Tools

AI assistance: none besides PR description help from Copilot

Testing Instructions

Screenshots or screencast

Before	After

Changelog Entry

Developer - Updated and added screenshots/casts.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

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Co-authored-by: jeffpaul <jeffpaul@git.wordpress.org>
Co-authored-by: dkotter <dkotter@git.wordpress.org>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[github-actions]

✅ WordPress Plugin Check Report

✅ Status: Passed

📊 Report

All checks passed! No errors or warnings found.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.50%. Comparing base (9db55ee) to head (c08b7d7).
⚠️ Report is 6 commits behind head on develop.

Additional details and impacted files

@@            Coverage Diff             @@
##             develop     #838   +/-   ##
==========================================
  Coverage      75.50%   75.50%           
  Complexity      2086     2086           
==========================================
  Files             99       99           
  Lines           8626     8626           
==========================================
  Hits            6513     6513           
  Misses          2113     2113           

Flag	Coverage Δ
unit	75.50% <ø> (ø)

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