Calculation and graph overhaul + Moon support

• Completely revamped calculations and Sun graph, now way more realistic
• Moon support: Moon on the graph, moonrise, moonset, Moon phase, Moon elevation and Moon azimuth
• Obeys Home Assistant's settings for time and number formatting
• Cleaned up config options
• Font size adjustments, including the smaller AM/PM text from the original card
• Lots of tests
• All lint warnings gone

Resolves the following issues:

• #11 - Moon support
• #30 - Horizon-card customize with card-mod
• #40 - More realistic visualization and own source of Sun data
• #54 - 24h format not working by default
• #58 - Support HA 2023.7's local/server time zone setting