Add unit tests

[mat-1]

There should be GitHub actions (probably have a new file called test.py that would run these tests, though i have no idea how to make github actions work) for checking:

• Test the ^entry command
• Make sure the website actually loads
• Check the index page content (& total entries)
• Make sure entry pages work
• Make sure search works
• probably other things idk

This isn't really important right now, but it's something we might want to add later.

[PotentialStyx]

ok

[selectdev]

We could add this into v3 quite easily since we are using Svelte

[selectdev]

I have a github action for one of my private repositories that checks for any Svelte page based issues and errors, if you want i can try to fetch the code i wrote for it and send it over on the Repldex discord for approval before i add it into the actual repo