A4A > Agency Tier: Add feature announcement modal animation video

[yashwin]

Proposed Changes

This PR adds an animation video for the Agency tier feature announcement modal.

Note: We will show the image that was previously shown on mobile devices

Testing Instructions

• Use the agency MC tool > Set the agency tier to undefined
• Open the A4A live link > Go to the Overview page > Verify that a modal is displayed as shown below (video animation)

https://github.com/user-attachments/assets/9d836194-9995-422a-83d3-be576ad9e8a4

Mobile view:

Pre-merge Checklist

• [ ] Has the general commit checklist been followed? (PCYsg-hS-p2)
• [ ] Have you written new tests for your changes?
• [ ] Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• [ ] Have you checked for TypeScript, React or other console errors?
• [ ] Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• [ ] Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
• [ ] For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions[bot]]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-7ad815f8c29f342bf485152e15b827412f7c8d85

Jetpack Cloud live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-7ad815f8c29f342bf485152e15b827412f7c8d85&env=jetpack

Automattic for Agencies live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:commit-7ad815f8c29f342bf485152e15b827412f7c8d85&env=a8c-for-agencies

[matticbot]

Here is how your PR affects size of JS and CSS bundles shipped to the user's browser:

Sections (~11 bytes added 📈 [gzipped])

``` name parsed_size gzip_size a8c-for-agencies-overview +96 B (+0.0%) +11 B (+0.0%) ``` Sections contain code specific for a given set of routes. Is downloaded and parsed only when a particular route is navigated to.

Legend

What is parsed and gzip size?

**Parsed Size:** Uncompressed size of the JS and CSS files. This much code needs to be parsed and stored in memory. **Gzip Size:** Compressed size of the JS and CSS files. This much data needs to be downloaded over network.

Generated by performance advisor bot at iscalypsofastyet.com.