Merge "Add documentation to README" into main

                       using the new bootloader.

## Flashing Logic

Fastboot binary will follow directions listed out fastboot-info.txt

build artifact for fastboot flashall && fastboot update comamnds.

This build artifact will live inside of ANDROID_PRODUCT_OUT &&

target_files_package && updatepackage.

The currently defined commands are:

    flash %s           Flash a given partition. Optional arguments include

                       --slot-other, {filename_path}, --apply-vbmeta

    reboot %s          Reboot to either bootloader or fastbootd

    update-super       Updates the super partition

    if-wipe            Conditionally run some other functionality if

                       wipe is specified

    erase %s           Erase a given partition (can only be used in conjunction)

                       with if-wipe -> eg. if-wipe erase cache

## Client Variables