Update SPARQL endpoint from WQS to Qlever and add prefixes

[zache-fi]

Description

This will change SPARQL endpoint from WQS to QLever Wikidata endpoint and add Wikidata default prefixes as they are not by default defined in QLever.

Source for the list of prefixes

• https://www.mediawiki.org/wiki/Wikibase/Indexing/RDF_Dump_Format#Full_list_of_prefixes

QLever debug queries

Item list used in ukbot

• https://qlever.wikidata.dbis.rwth-aachen.de/wikidata/kAGvnJ

When QLever data has been updated

• https://qlever.dev/wikidata/Ge3kvC

What type of PR is this? (check all applicable)

• 🍕 Feature
• 🐛 Bug Fix
• 📝 Documentation Update
• 🎨 Style
• 🧑‍💻 Code Refactor
• 🔥 Performance Improvements
• ✅ Test
• 🤖 Build
• 🔁 CI
• 📦 Chore
• ⏩ Revert

Related Tickets & Documents

Change fixes #29 where SPARQL queries are timeouting because WQS performance issues.

Tested?

• 👍 yes
• 🙅 no, because they aren't needed
• 🙋 no, because I need help

Added to documentation?

• 📜 README.md
• 📖 own file under the docs folder
• 🙅 no documentation needed

[optional] Are there any pre- or post-deployment tasks we need to perform?

Change is currently running directly on production so local changes need to be reverted before doing pull

become ukbot
git diff
git checkout ukbot/filters.py