[EGD-6567] Add GSM time update handling

Adds handling GSM time update in service time.

[EGD-5171] Utils to string fix

Fixed utils to string function to work with 8 bit integers.
Also nodiscard attribute added there.

[BH-359] Move TPLIB pugixml to separate dir

Changed submodule directory and updated cmake scripts and include paths

[EGD-6654] Add self-tuning for RC oscillator

Calibrate the RC before switching to the internal oscillator.
This improves the precision of the system clock.

[EGD-6837] Add post merge pipeline and ram disk build

Add support build in ram disk

[EGD-6736] Add app's state dependent autoLock mechanism

This PR provides the implementation of the auto-locking mechanism that
is dependent on an application's current auto-locking policy. Three
auto-lock policies have been introduced:

* DetermineByWindow
* DetermineByAppState
* PreventPermanently

Also changed the AutoLockWindow set/get auto-lock time value to the
message-based approach.

[EGD-6447] Add Bluetooth PIN pairing

Implemented legacy pairing using PIN code

[EGD-6796] Fix excesive ATA command with HSP

This commit fixes excesive ATA cmd in HSP by checking call type in
ServiceCellular.

[BH-361] Move date to separate directory

Move date to separate directory

[BH-356] Move TPLIB (microtar) to separate directory

Move microtar to lib, amend CMAKE files

[EGD-6605] Fix RTC time not retained between resets if set manually

When setting datetime from timestamp (manually, not from network),
SRTC is set in order to retain the RTC datetime between resets.

RTC handling was refactored in order to get rid of unnecesary
conversions and third-party code mixed with proprietary code
within a single file.

[EGD-6800] Enable voice transcoding

Add voice transcoding during phone call with two basic transforms:
 - sample rate downscaling by a factor of 2 with a decimator
 - sample rate upscaling by a factor of 2 with an interpolator (no
low-pass filter)

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

[EGD-6809] Block building unrebased commit

Added blocking commits that are out of date

Merge branch 'stable' - release v0.66.1

changelog: add changelog for v0.66.1

[BH-364] Move TPLIB magic_enum to separate dir

Changed submodule directory and updated cmake scripts and include paths

[EGD-5762] Add documentation to AutoLock functionality

This PR provides documentation for automatic lock functionality

[EGD-6338] Fix NAT widget visibility

Make sure that NAT (Network Access Technology) widget is visible on top
bar ONLY during call.

[EGD-6737] Fix light curve for auto FL brightness

Light curve for automatic frontlight brightness adjustment
changed to decrease brightness with increasing
ambient lighting luminescence.

[EGD-6536] Settings API guideline added

Guideline explaining how should Settings object be used