Feature/sunline ephem documentation

[ShamsaSabekZaei]

• Tickets addressed: xmera-000
• Review: By commit \
• Merge strategy: Merge (no squash)

Description

The PR updates the sunlineEphem module documentation where it includes:

• Introduction
• Module Input/Output Messages
• Algorithm Computation
• Module Assumptions and Limitations
• Test Description and Success Criteria

Verification

The documentation was updated and no changes on the codes were made. However, the unit test can be improved in the future.

Documentation

The documentation was updated and the reviewer should check:

• RST format (table, parameters, references are linked correctly).
• The algorithm and unit test descriptions accurately describe the code.
• The message variables, type and description properly reflect what's in the code.
• The headings and content cover all the aspects a documentation should have.

Future work

The documentation will be more helpful with figures for better visualization, which I plan to add by next week.