Unit progress navigation style

[rnr]

This PR is for next issues:

• https://github.com/openedx/openedx-app-ios/issues/200
• https://github.com/openedx/openedx-app-ios/issues/206
• https://github.com/openedx/openedx-app-ios/issues/215

Added a progress bar at the top of the content screen. Each block can have one of four states:

• selected completed
• selected incomplete
• completed unselected
• incomplete unselected

If the progress line is present, the navigation style changes from vertical to horizontal. This was done with COURSE_UNIT_PROGRESS_ENABLED FF - please use the configuration branch https://github.com/edx/edx-mobile-config/tree/saeed/openedX

https://github.com/openedx/openedx-app-ios/assets/37253/0351364d-50a4-4507-a84f-959b859e954b

[rnr]

Shouldn't the arrow icon on the previous button in the unit navigation be on the left side of the text?

thank you for the highlighting fixed

[saeedbashir]

The progress gets lost in the same run if go back and come to the same screen.

https://github.com/openedx/openedx-app-ios/assets/5606473/1caa8d13-8e7a-4afb-8af9-49297efd7c20

[volodymyr-chekyrta]

🚀 🚀 🚀