[EGD-5099] Fix GUI module readme

Fixed typos in GUI module readme file.

[EGD-5151] Fix timers callback issue

Fix timers callbacked issue and make sure there is no need to
call connect() after each stop().

[EGD-5092] Add instructions to development_workflow

Added instructions regarding adding licenses of 3rd party code when
creating a PR.

[EGD-5092] Fix year to 2021

Updated the year to the current one.

[EGD-5092] Add 3rd party licenses

Added missing 3rd party licenses to relevant sections in
LICENSE.md

[EGD-5103] Fix year in license header check

Bumped year to 2021 in automated license header checker.

[EGD-5078] Fix Debug UART conditional enabling

Uart debug will be enabled only when redirecting logs to Uart

[EGD-4881] Add oscillator clock switching mechanisms

Osc will change automatically at the lowest CPU frequency,
which will save power

[DW-31] Add a condition that prohibits checks to be run on draft PRs

Unfortunately, github actions doesn't support using "if" property in
defaults and that's why we need to repeat it for all jobs

[EGD-4590] Change KBD parser to JSON for input keyboard files

Changed keyboard input language parser to parse JSON files.
Removed all KPROF files and added JSON.
Added unit tests for new parser.
Modified document about adding languages.

[EGD-5050] Add brownout detection

Brownout detectection realized through charger driver

changelog

battery renames, clean up, degreasing

[EGD-5089] linux battery bsp charging done added

[EGD-4932] new battery icons + battery in TopBar rework

[EGD-4932] all new battery icons - rename

[EGD-4794] all new battery icons (monochrome)

[EGD-4999] fix charger pluging but no icon on Linux

[EGD-5067] Add VS Code GDB configuration for RT1051 and Linux targets

Added "(gdb) Attach" and "(RT1051) RelWithDebInfo" configurations
Fixed RT1051 target gdb setup for FreeRTOS

changelog: fix broken changelog for v0.49.1