Backend

[gregorsternat]

Description

This PR introduces major backend and frontend improvements for EsportOracle:

• Added backend endpoint connecting to PandaScore API
• Fixed ban management logic and improved wallet integration with Viem
• Implemented Ethereum transaction support (AddTransaction)
• Set up Vue.js frontend with PrimeVue components (navbar, profile, match card)
• Display of live match data from PandaScore

Changes include

• Bugfix (non-breaking change that solves an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (change that is not backwards-compatible and/or changes current functionality)

Breaking changes

Please complete this section if any breaking changes have been made, otherwise delete it.

Checklist

• I have assigned this PR to myself
• I have added at least 1 reviewer
• I have added the needed labels
• I have linked this PR to an issue
• I have linked this PR to a milestone
• I have linked this PR to a project
• I have tested this code
• I have added / updated tests (unit / functional / end-to-end / ...)
• I have updated the README and other relevant documents (guides...)
• I have added sufficient documentation both in code, as well as in the READMEs