HACK: Use a packet size of 512 for USBMSD. ...

This is what the ST USBPhy code requires when using HS OTG.

Fix all Doxygen errors and make any future errors fatal (#118) ...

* Start working on fixing doxygen warnings

* Upgrade doxyfile to Doxygen 1.9.1

* Clean up some unmatched groups and add some exclusions

* Fix docs for rtos::ThisThread not showing up

* Fix up KV store docs

* Fix incorrect @files, some more incorrect groups

* Fix lots of broken links

* Start fixing mbedtls groups

* Fix more mbedtls docs

* Fix remaining mbedtls files with missing or incorrect grouping

* Fix a huge amount of PSA docs errors

* Fix a few more mbedtls docs errors

* Fix __cplusplus not defined for docs, clean up call in callback typedef, fix some docs errors

* Fix some broken doc links in HAL headers

* Fix more PSA doc errors

* Fix some doxygen errors in networking code

* Fix lots of network related doc errors

* Try and fix some CI failures

* Use Doxygen Action instead of doxygen in Mbed container to get the right version

* Try removing docs check

* Add first part of doxygen action

* Add next part of doxygen action

* Fix yaml syntax error

* Add in license check fix

* Try using verbose scancode

* Fix some more docs issues, workaround scancode-toolkit#3179

* Clean up the LoRaRadio get_state() function on each implementation.  Also fix some other compile and doc errors.

* Fix all remaining doxygen errors

* Fix escaping, for realsies this time

* Remove Doxygen unsupported config options, fix some more get_status() declarations

* Fix some UNITTESTS build errors

* Fix one more compile error

* Another unittest error

Convert mbed-usb target, enable mbed-usb tests (#49) ...

* Convert mbed-usb target, enable mbed-usb tests

* Fix ByteBuffer compile error

* Add missing requirements, fix some pyserial issues

* Move CDC_ECM to its own target since it needs RTOS

Fix ABI differences between mbed-baremetal and mbed-os, remove PlatformMutex

USB: use fully-qualified RTOS include paths ...

The Arm Compiler is case sensitive and unable to distinguish
between `Thread.h` from Mbed OS RTOS and `thread.h` from TF-M's
OS wrapper, for example. This resolves compilation failures due to
wrong includes.

To resolve this, use the fully-qualified include paths for the
RTOS API.

fix namespaces for MBED_NO_GLOBAL_USING_DIRECTIVE feature ...

added namespaces in various files

Moved USB drivers under drivers/usb