Fix #16, Convert LC state macros to enums

[thnkslprpt]

Checklist

• [x] I reviewed the Contributing Guide.
• [x] I signed and emailed the appropriate Contributor License Agreement to GSFC-SoftwareRelease@mail.nasa.gov and copied cfs-program@lists.nasa.gov.

Describe the contribution

• Fixes #16
  • The LC state and Action Point state #define macros have been converted to enums.

Testing performed GitHub CI actions (incl. Build + Run, Unit Tests etc.) all passing successfully.

Expected behavior changes No impact on behavior. Enums improve type-safety and ease debugging.

Contributor Info Avi @thnkslprpt