Pull/nxp nxp smart lock demo app v2 (#2340)

* [K32W] Sync Project CHIP with SDK 2.6.1-MR1

Make possible to build Project CHIP using a publicly available
SDK which can be downloaded from mcuxpresso.com.

Signed-off-by: Doru Gucea <doru-cristian.gucea@nxp.com>

* [K32W] Use OT submodule instead of prebuilt libs

Signed-off-by: Doru Gucea <doru-cristian.gucea@nxp.com>

* [K32W] Add NXP Smart Lock Build Instructions

Signed-off-by: Doru Gucea <doru-cristian.gucea@nxp.com>

* Restyled by prettier-markdown

Co-authored-by: Restyled.io <commits@restyled.io>