AVR32: CDC VCOM console for MSH for Mizar32

Dear RT-Thread community, Greetings!

I have been exploring the code to implement the support for USB CDC
for the Mizar32 (AVR32) platform. I have currently enabled UART-1 as
the default console for the Mizar32 platform. I had a few questions to
ask. I will list them as points:

1. Without going through the RT-Thread's USB communication device
   sub-system/protocol (CDC), is there a way to route the default
   RS-232 interactions on MSH via Microchip's CDC stack?

2. I made a test (debug) Microchip Studio application a while ago
   for testing RT-Thread's functionality with the drivers I
   implement/experiment with; i.e. before I send a PR. The code is here
   [1].

I tested VCOM on Mizar32 by calling the USB stack's routine within
RT-Thread. Can you please check [2]? In [2], I am just instantiating
a thread (rt_thread_usb) to invoke the Atmel's stack for
enumeration. I am attaching a picture of it.

I used an FTDI breakout to talk to MSH on UART-1 and spawned another
terminal emulator instance to check the output of CDC VCOM. It
works. Is there a way to override the default UART-1 to bring in
VCOM and the stack at [2] for MSH?

3. I have seen RT-Thread's support for CherryUSB and TinyUSB. They
   are outside RT-Thread. Can a stack such as Atmel's in [3] be within
   AVR32's BSP? Would you permit this?

4. I read a very interesting article [4] which introduced me to
   vconsole. I can find it within the packages menu but not on Github.
   I am not sure if the link is broken. Is there a way to implement
   what vconsole does by default on Mizar32 - with [3]?

Please do give me your suggestions. Merry Christmas!

References:
[1]:https://github.com/ramangopalan/rtthread_mizar32b_sample/
[2]:https://github.com/ramangopalan/rtthread_mizar32b_sample/blob/master/rtthread_mizar32b_sample/bsp/avr32/at32uc3a0256/application.c
[3]:https://github.com/ramangopalan/rtthread_mizar32b_sample/tree/master/rtthread_mizar32b_sample/bsp/avr32/software_framework/drivers/usb-cdc
[4]:https://github.com/RT-Thread/rt-thread/issues/4227

Start by reading the AVR32 application.c example and the usb-cdc driver directory linked in the issue, then compare the vconsole discussion in issue #4227. Investigate how MSH currently uses UART-1 and how RT-Thread's USB CDC support is integrated. The issue does not define a concrete acceptance condition for routing MSH through CDC or including the Atmel stack.