Change macros from TYPE_RO_ARRAY to TYPE_ARRAY_RO for legibility

[Scottapotamas]

Feedback suggests the RO section of the tracked variable macros is more sensible as the final suffix.

• [x] Change macros
• [x] Update references in doxy/comments
• [x] Arduino example update
• [x] Update documentation
• [ ] Update STM32 example project
• [ ] Update ESP-IDF example project