Add initial preview and review cards to FWE

[parlough]

@ericwindmill These are rather rough, so please do either modify these now or as a follow-up to match your vision for each lesson.

[gemini-code-assist]

Summary of Changes

Hello @parlough, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the tutorial experience by adding 'SummaryCard' components to various lesson pages. These cards serve as quick reference points, outlining the learning objectives at the beginning and summarizing the key takeaways at the end of each tutorial. This change aims to improve content clarity and navigation for users engaging with the learning material.

Highlights

• New Feature: Summary Cards: Introduced new <SummaryCard> components to tutorial pages, providing a clear overview of lesson objectives and accomplishments.
• Tutorial Content Enhancement: Integrated 'What you'll accomplish' cards at the start of each tutorial and 'What you accomplished' cards at the end, summarizing key learning points with icons and detailed descriptions.
• Styling Updates for Summary Cards: Applied specific CSS styling to the new summary cards, including vertical margins, adjusted text colors, increased heading font weight, and font family specifications for a consistent look and feel.
• Minor CSS Adjustment: Added user-select: none; to picture and font-feature-settings in the base SCSS for improved user experience.

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[gemini-code-assist]

Code Review

This pull request introduces SummaryCard components at the beginning and end of numerous tutorial pages, which is a great enhancement for learners. The changes also include the necessary styling for these new cards. My review provides a few suggestions to refine the SCSS and correct minor issues in the markdown content.

[flutter-website-bot]

Visit the preview URL for this PR (updated for commit 10b686f):

https://flutter-docs-prod--pr12821-feat-fwe-preview-review-tila5t2w.web.app

[sfshaza2]

Overall, this looks good, but I am wondering about the icons in "what you'll learn" and the summary, such as you see here: https://flutter-docs-prod--pr12821-feat-fwe-preview-review-tila5t2w.web.app/learn/tutorial/change-notifier.
I'm not sure that I learn much from the icons. Is there an icon glossary somewhere?

[ericwindmill]

+1 to Shams comment... We should be intentional about the icons. If there aren't suitable icons then we can maybe have someone create them.

tbh these look pretty good to me. I'd prefer to just land them and edit them holistically when I do a final pass