[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

[EGD-7361] Fix not booting from image

After moving some files to libboard.a the linker was not eager to look
for symbols that should be in the boot header (.boot_hdr section).

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

[BH-743] Add EventRecord implementation

Add EventRecord implementation + tests

[BH-783] Add big version of GT Pressura font

GT Pressura regular font 190 size is needed in Bell.

[EGD-7355] Fix clang checking script

Fixed version check

Fix transparent backgrounds in PlantUML

Images generated using PlantUML had transparent backgrounds which made
their text difficult to read on GitHub when using "Dark Mode". Forcing
a background color of #F0F0F0 ensures they are all readable.

[BH-721] Fix and add new rrule generator methods

Add rrule generator for next incoming timestamp
Add ical iterator wrapper
Fix existing range generator to include event start timestamp
Use time lib TimePoint definition
Add neccessary public dependencies

[BH-739] Split EventManager

Renaming:
- rename EventManager to EventManagerCommon,
- rename PureEventManager and BellEventManager
to EventManager

[BH-739] Split EventManager

Move `test-settings` to `PurePhone` product-specific directory