Clarify equivalence of /pwa-pwastore/ & /pwa-installer/

[mikehoffms]

Need to state the relation between the /pwa-pwastore/ & /pwa-installer/ samples/dirs, in:

• Readme for /pwa-pwastore/
  • https://github.com/MicrosoftEdge/Demos/blob/main/pwa-pwastore/README.md
• Readme for /pwa-installer/
  • https://github.com/MicrosoftEdge/Demos/blob/main/pwa-installer/README.md
• The regular article's section about PWA installer
  • https://learn.microsoft.com/microsoft-edge/progressive-web-apps/demo-pwas#pwa-installer
  • Handled in https://review.learn.microsoft.com/microsoft-edge/progressive-web-apps/samples/?branch=pr-en-us-3476#pwa-installer
• The PWA table in this repo's main Readme
  • https://github.com/MicrosoftEdge/Demos?tab=readme-ov-file#progressive-web-apps-pwas

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Details/research

This repo's main dir
https://github.com/MicrosoftEdge/Demos
lists the /pwa-pwastore/ dir:
https://github.com/MicrosoftEdge/Demos/tree/main/pwa-pwastore
yet that dir / sample isn't listed in Readme eg the PWA table:
https://github.com/MicrosoftEdge/Demos?tab=readme-ov-file#progressive-web-apps-pwas

The table instead, only, lists pwa-installer.
https://github.com/MicrosoftEdge/Demos/tree/main/pwa-installer

Other aspect of same issue: The article section "PWA installer"
https://learn.microsoft.com/microsoft-edge/progressive-web-apps/demo-pwas#pwa-installer
instead links to:

• https://microsoftedge.github.io/Demos/pwa-pwastore/
• https://github.com/MicrosoftEdge/Demos/tree/main/pwa-pwastore

Shouldn't that article section link instead to pwa-installer instead? Or, in addition? see draft:
https://review.learn.microsoft.com/microsoft-edge/progressive-web-apps/samples/?branch=pr-en-us-3476#pwa-installer