[EGD-7301] Documentation added to the pure flash

Pureflash documentation added

Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>

[BH-727] Create eink configuration for products

Customize screen resolution depending on which product is selected.
Screen resolutions for hardware boards are fixed by design.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[CP-305] Add sign update package in secure mode

Add signing package when the secure mode
is enabled

Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>

[BH-799] Split DeveloperModeHelper - part I

Rename DeveloperModeHelper to DeveloperModeHelperCommon

[BH-740] Split ApplicationManager

- move `LowBattery` handling to Pure `ApplicationManager`,
- cleanup `ApplicationManagerCommon`

[BH-740] Split ServiceDB

Fix `DBQuery` msg handling in ServiceDB

[EGD-7367] Latest daily_release.sh script from server

Please mind that I'm not author of most of these chages, what I added
was use of VERSION to build package - to fix version as date

[BH-740] Split SystemManager - part II

Create separate SystemManager for Pure and Bell

[BH-785] AlarmEventDBRepository

Add AlarmEventDBRepository

[BH-754] Split ServiceDB

- rename ServiceDB to ServiceDBCommon,
- create separate ServiceDB for Pure and Bell,
- move Pure-specific functionality
from `ServiceDBCommon` to Pure `ServiceDB`

[BH-779] Merge service-alarm into service-time

Merge service-alarm into service-time

[BH-774] Split event worker

Split event worker to independetly customize events for products.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[BH-740] Split SystemManager - part I

Rename SystemManager to SystemManagerCommon

[BH-626] Home screen

Added home screen GUI and corresponding  logic

[BH-741] Split ApplicationManager

ApplicationManager no OnBoarding app fix

[BH-739] Split EventManager

Temporary fix for Bell EventManager EventWorker queues.
Queues in WorkerEvent::init are accessed by
index based on `WorkerEventQueues` enum which cause
that all queues must be inserted and the order of queues
must be correct.

[BH-685] Add alarm handler factory

This commit adds factory for alarm handlers with
basic handlers draft for Bell.

[BH-743] Add AlarmEvents

Add AlarmEvents to database

[BH-741] Split ApplicationManager

Separate Pure and Bell ApplicationManager functionalities
to separate files.

[BH-777] Add Bell specific ld script configuration

Added bell specific ld script configuration for
board memory layout