Add Local Network Access to iframe allow

[gohai]

Issue:

See https://learn.microsoft.com/en-us/deployedge/ms-edge-local-network-access for details. This still yields to the browser on whether or not to allow the actual request, but it adds the possibility to interface with a local host via CORS requests from within the iframe.

I have verified that this pull request:

• has no linting errors (npm run lint)
• has no test errors (npm run test)
• has no typecheck errors (npm run typecheck)
• is from a uniquely-named feature branch and is up to date with the develop branch.
• is descriptively named and links to an issue number, i.e. Fixes #123
• meets the standards outlined in the accessibility guidelines

[welcome]

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