v6.0.0

- CMSIS-Core: 6.0.0
  - Core(M) and Core(A) joined into single Core component
  - Core header files reworked, aligned with TRMs
  - Previously deprecated features removed
  - Dropped support for Arm Compiler 5
- CMSIS-DSP: moved into separate pack
- CMSIS-NN: moved into separate pack
- CMSIS-RTOS: deprecated and removed
  - RTX4 is deprecated and removed
- CMSIS-RTOS2: 2.3.0
  - OS Tick API moved from Device to CMSIS class
  - Added provisional support for processor affinity in SMP systems
  - RTX5 is moved into separate CMSIS-RTX pack
- CMSIS-Driver: 2.9.0
  - Updated VIO API 1.0.0
  - Added GPIO Driver API 1.0.0
- CMSIS-Pack: moved into Open-CMSIS-Pack project
- CMSIS-SVD: moved into Open-CMSIS-Pack project
- CMSIS-DAP: moved into separate repository
- Devices: moved into separate Cortex_DFP pack
- Utilities: moved into CMSIS-Toolbox project