[BH-370] Convert utils common_data into a libs

Create clipboard and eventsore libs

[BH-378] PR changes

PR changes - mainly includes

[BH-378] Utils move log to library

Moved log to separate library

[BH-371] Replace gsl with mainline submodule and move to third-party

Replacing loose gsl files with gsl mainline project as submodule
and moving it to third-party

[EGD-5976] Add tethering cellular disabling

This commit adds disabling of URC messages during
tethering mode. It also adds call and sms logging after
tethering is disabled.

[EGD-6701] System time usage fixes

Fixed all calls to stdlib time.
Removed all redundant calls to Timestamp treated as time source.

[BH-361] Move date to separate directory

Move date to separate directory

[EGD-6728] Documentation cleanup

Cleanup acc. to guidelines created in EGD-6632.

[EGD-3542] Fix issue with sending text messages form new message window

Fixed too short timeout for sending sms
Fixed flow for switching to thred window to asynchornous one
Fixed some minor issues connected to new sms error handling

[EGD-6319] Refactor cellular modem directory

- Removed not used files from old implementations.
- Renamed some classes to follow naming convention.
- Renamed methods to use consistent styling.
- Restructured code.

[EGD-5748] Remake Cellular flow

This commit remakes cellular data flow
introducing full error propagation.

[EGD-6527] Internationalization API unification

Single api to rule i18n
all calls to localistaion in cpp files unified
cut off ass many dependencies in i18n header as possible

[EGD-6507] Enable per-module testing

Add per-module:
 - test build
 - test execution
 - coverage reporting (xml/html).

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

[EGD-5748] Revert remake cellular flow

Reverts changes due to reported issues

[EGD-6121] Add offline mode in service cellular

Adds entering and leaving ito offline mode in sevice
cellular. Outgoin SMS and calls are blocked Proper popups
are shown in applications Call and Messages.

[EGD-5748] Remake Cellular flow

This commit changes TS0710 Worker operation.
1. It introduces MessageBuffers as main
interprocess data passing mechanism.
2. DMA transaction status codes and CMUX errors
are now propagated to Service.
3. Data processing has been refactored.

[EGD-6325] Fix linker error gcc 10

This PR covers linker error caused on gcc10 Release build
while trying to run unit test cellular parse result.

[EGD-4863] Add harness test for cellular sleep mode

Adding test for outgoing call and text message
in cellular sleep mode

[EGD-4852] Add sleep mode for GSM modem

When the GSM modem is idle and there is no communication,
it enters the sleep mode, where the power consumption
is significantly reduced.

[EGD-6455] Fix modem AT command timeouts

Fix modem AT command timeouts and make sure they are at least
bigger than the ones defined in Quectel specs.