feat: add showcase for KQED

[abdallahshaban557]

• feat: Add KQED showcase and company data
• chore: update showcase industries to Media and Entertainment and reorder grid filters

Description of what this PR is changing or adding, and why:

Issues fixed by this PR (if any):

PRs or commits this PR depends on (if any):

Presubmit checklist

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[gemini-code-assist]

Code Review

This pull request adds a new showcase page for KQED, updates metadata (such as industries and publish dates) for several existing showcase entries, and updates the showcase grid component to support the new "Media and Entertainment" industry while sorting filter lists alphabetically. Feedback was provided to format the new KQED markdown file using semantic line breaks of 80 characters or fewer to improve readability and maintainability.

[flutter-website-bot]

Staged preview of the updated docs.flutter.dev site (updated for commit 3475fd7):

https://flutter-docs-prod--docs-pr13536-showcase-kqed-igxe67hm.web.app

[flutter-website-bot]

Staged preview of the updated flutter.dev site (updated for commit 3475fd7):

https://flutter-dev-230821--www-pr13536-showcase-kqed-6gr9n1zo.web.app

[sfshaza2]

lgtm