arch:
* Architecture ARM64 support.
* Updated ARM cortex-a/cortex-r support.
* Unified ARM cortex-m series support.
* Added ARM cortex-m backtrace.

build:
* Add a component-based compilation framework to support LiteOS Studio compilation.

components:
* Added AI runtime framework.
* Updated the SensorHub Framework.
* Graphical component capability support.

demos:
* Added the lms demo.
* Added the trace demo.
* Added the sensor hub demo.
* Added GUI Demo.
* Added AI demos.

kernel:
* Unified kernel, elastic support for multiple architectures.
* The SMP multi-core scheduling support.
* Enhanced the system debugging commands (task, swtmr, memory, and sysinfo).
* Added the IPC APIs to support POSIX(deadlock, queue, mux, sched, and sem).
* Cplusplus support.
* Cpup support.
* Lite memory sanitizer support.
* Trace support.

lib:
* The standard library libc (musl) support.
* Huawei libsec security function library support.
* Updated posix interface.
* The zlib library support.

shell:
* Added shell to support debug.

targets:
* Added the QEMU debug.

tools:
* Enables the menuconfig function.