0.8.0 - Dual Pi-hole support!!! Add 30 Pi-Holes if you want! 💯 🧮

• chore: bumps version to 0.8.0 by @gh-action-bump-version
• chore: bumps version to 0.7.3 by @gh-action-bump-version
• limited dual pi-hole support - thanks @Drudoo! by @warmfire540
• chore: bumps version to 0.7.2 by @gh-action-bump-version
• Fix documentation for manual installation (#19) by @bastgau
• chore: bumps version to 0.7.1 by @gh-action-bump-version
• for now we just combine all switches by @warmfire540
• header shows info about multi pi & partial state by @warmfire540
• card can accept many devices and not explode by @warmfire540

Full Changelog: 0.7.3...0.8.0