Problem this feature will solve

Discover the current state of accuracy for Astronoby.

Desired solution

Provide documentation to users so that they know if the library fits their needs.

Alternatives considered

In #111 and #112, a script is mentioned to test many observer locations for each day of 2024 in order to spot bugs. The same method could be used to spot occurrences where Astronoby and the library SunCalc have a significant difference.

These differences could then be analyzed and compare with the IMCCE, considered as the source of truth, in order to have an idea of how accurate Astronoby is on the Ruby ecosystem.

Additional context

Data to consider:

• Sun coordinates
• Moon coordinates
• Sun rising, transit and setting times
• Moon rising, transit and setting times
• Moon's illuminated fraction