[Feature] Error Page

[danieldanielecki]

Developer a proper Error Page view that would handle errors.

Since #13 the error handling is done on a basic level, so the page doesn't crash like initially in #3, but it doesn't look pretty at all.

The screenshot shows how it currently looks like for tests described in #3 (excl. PSPO, for which repo doesn't exists, and hence error on second screenshot is shown.

[danieldanielecki]

Done, but error handling could've been improved across the app anyways.

[danieldanielecki]

Done, but error handling could've been improved across the app anyways.

I meant: something on the root level of the application, to handle the second screenshot from this issue, when the entire app is done. Maybe something in the layout.tsx.

Error handling is done now for exam & practice tests, that's good, with nice UI. Also for search queries, in page.tsx, but something on the root level could've been added as well. Created #53 for improvement.

[danieldanielecki]

In this issue UI has been improved, but still quite some to go with having the right mechanism to work properly.