Changes to `Development workflow` article and a brand new `How to contribute to MuditaOS` article (#673)

New `Development workflow`, `How to contribute`, and `How to edit changelog` articles.

Co-authored-by: Wojtek Cichoń <wojciech.cichon@mudita.com>
Co-authored-by: Łukasz Anwajler <lukasz@anwajler.com>

changelog: update changelog for v0.37.1

[EGD-3097] Add storing and updating audio settings in database.

[EGD-3532] identify thread with a number

Use phone number instead of contact number to identify a message thread
to allow having multiple threads for a contact if contact has multiple
numbers.

[EGD-3602] fix non aggregate construction

Remove aggregate construction of a non aggregate.

[EGD-3602] add missing headers

Missing headers were causing compilation errors when building with
clang-tools.

[EGD-3620] Phonebook contact details flags sizes fixes.

[EGD-3606] fix speed dial on contact merge

When there is a conflict on a speed dial user is promptod if he/she
wants to move speed dial number to the updated contact. Currently this
does not work because of invalid meta update in the DialogYesNoIconTxt.

Fix meta update in the above mentioned class to enable proper speed dial
moving to the updated contact.

[EGD-3607] New settings cause boot error

[EGD-3603] Change alternative/other number to second number

[EGD-3603] Cleanup

[EGD-3603] Update changelog

[EGD-3599] added missing queries to calllog DB

[EGD-3599] PR fix

[EGD-3182] Implemented on CRUD notification page and on page item focus memory when rebuilding List. Applied for Phonebook and Messages.

[EGD-3130] NoName contacts at the end of contact list

[EGD-3035] unify time formatting functions

[EGD-3130] NoName contacts at the end of contact list

[EGD-3593] fixed unhandled factory-reset endpoint

added update file check in update endpoint
added missing getByThreadID message query

[EGD-3553] added functional tests for service-desktop

UT & PR fixes

[EGD-3600] vfs: fix format warnings

Fix format warnings in vfs' logs.
Remove warning supressors - we don't need them.

changelog: update changelog for v0.36.1

Fix misplaced change for v0.33.1

[EDG-3415] Handle new line when entering text