Changes

#6580 (Apr 15, 2024, 8:59:06 AM)

1. doc: Introduce code architecture section with main class diagram — Pau Espin Pedrol / detail

#6573 (Apr 12, 2024, 7:59:07 PM)

1. README.md: Remove 'multi-slot ul tbf' line from 'Current Limitations' — Pau Espin Pedrol / detail
2. bts: Drop no-longer existing GprsMsStorage reference — Pau Espin Pedrol / detail
3. tbf.h: Fix wrong type declaration of field dl_ass_fsm — Pau Espin Pedrol / detail
4. tbf_ul.h: Mark empty param list as void — Pau Espin Pedrol / detail