evt: add basic test procedure

SD and uart console hookup details.

Signed-off-by: Nishanth Menon <nm@ti.com>

test-reports/evt/procedure/README.md

+Test procedure for Pocket beagle 2
+==================================
+
+* [Serial Console](serial_console.md)
+* [SD Card](sd-card.md)

test-reports/evt/procedure/sd-card.md

+Connecting SD Card
+==================
+
+Pre-requisites
+--------------
+* [micor-sd](https://www.amazon.com/SanDisk-Ultra-UHS-I-Memory-Adapter/dp/B00M55C0NS/)
+
+Connecting the SDCard
+---------------------
+
+> :warning: Be careful NOT to break SDcard with pressure from top due to the spacing
+
+![SDCard](img/pb2_sd_card.jpg?raw=true "SDCard")
+![SDcard spacing](img/pb2_sd_card-2.jpg?raw=true "SDCARD spacing")
+![USR Button/Power](img/pb2_sd-push-button-power.jpg?raw=true "SDCARD USRButton")
+
+Booting with SDCard
+-------------------
+* Flash a bootable SDCard image on uSD card
+* With the user button pressed, plug-in power supply over type C
+* Once the serial messages startup, let go of the USR button

test-reports/evt/procedure/serial_console.md

+Serial Console Connectivity
+===========================
+
+Pre-requisites
+--------------
+* [CP2102 USB2Serial adapter](https://www.amazon.com/gp/product/B078W5L8W1/)
+* [Male to Female Jumper cable](https://www.amazon.com/EDGELEC-Breadboard-Optional-Assorted-Multicolored/dp/B07GD2BWPY/)
+
+Connecting the serial cable
+---------------------------
+
+![Console pins schematics](img/pb2_serial_console_shm.jpg?raw=true "Serial Cable Schematics")
+![Connecting serial cable](img/pb2_serial_console.jpg?raw=true "Connecting Serial Cable")