No graceful 404 page when navigating directly to nonexistent org

[serhalp]

Repro steps:

1. Navigate directly to https://npmx.dev/@react-bot (this org does not exist)
2. See this error:

For reference, the package (https://npmx.dev/nfjdasnfksdfksd) and user (https://npmx.dev/~nfjdasnfksdfksd) 404 pages are correctly implemented:

[parion]

I think #124 closes this issue, but leaves a concerning case open that @MatteoGabriele was finding.

Now the https://npmx.dev/@react-bot doesn't fail but instead shows the react-bot user's profile data, but as an org page.

Interestingly, this page shows one less result than the actual user page: https://npmx.dev/~react-bot. I'm thinking this is because, for some reason, the org page includes deprecated packages and the user page doesn't.

And for any other org that doesn't exist, the 404 page seems to be working fine.