feat: InAppLocalhostServer decode assets url when loading them

[Nirajn2311]

Connection with issue(s)

Closes #1656

Testing and Review Notes

Run the app and access localhost:8080/page 1.html in the webview. It will load up with its contents now.

Screenshots or Videos

To Do

• double check the original issue to confirm it is fully satisfied
• add testing notes and screenshots in PR description to help guide reviewers
• request the "UX" team perform a design review (if/when applicable)

[pichillilorenzo]

@all-contributors please add @Nirajn2311 for code

[allcontributors]

@pichillilorenzo

I've put up a pull request to add @Nirajn2311! 🎉