[EGD-5877] Remove flash script update flasing doc

Remove old flashEMMC script and update flash documentation

Update doc/boot_and_update.md

Co-authored-by: Wojtek Cichoń <wojtek.cichon@protonmail.com>

Update doc/running_on_phone.md

Co-authored-by: Wojtek Cichoń <wojtek.cichon@protonmail.com>

Update doc/running_on_phone.md

Co-authored-by: Wojtek Cichoń <wojtek.cichon@protonmail.com>

Update doc/running_on_phone.md

Co-authored-by: Wojtek Cichoń <wojtek.cichon@protonmail.com>

Update doc/boot_and_update.md

Co-authored-by: Wojtek Cichoń <wojtek.cichon@protonmail.com>

Update doc/running_on_phone.md

Co-authored-by: Wojtek Cichoń <wojtek.cichon@protonmail.com>

[EGD-5737] Merge master into experimental

Synchronize with master before merging

[EGD-5813] Add add to docker group step in bootstrap

Introduce one more step to bootstrap so user doesn't have
to run in manually.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5787] Fixes re fallback font docs

Fixed proper info about default fallback font.

[EGD-5787] Fix font-rendering docs

Added small fixes to the i18n article.

[EGD-5787] Adding font-related docs to i18n article

Added missing content regarding adding special glyphs
and rendering the font inside MuditaOS

[EGD-4763] Add documentation on how to add unit tests

Short document about how to add, enable and disable unit test.

Merge branch 'master' into stable

[EGD-3390] Add integration with clang-tidy

Clang-tidy is used to perform static code analysis.

[EGD-5241] Update development workflow documentation

Remove the obligation to update the changelog with every PR. Remove
obligation to start a change description with "Change" verb. Add some
other minor spelling and grammar fixes.

Update commit message template to reflect the changes.

Merge branch 'master' into stable

[EGD-4591] Change input language parser to load from files

Completely independent input language files and display language files.
Input language files are now loaded based on number of files in
"profiles" folder.
InputLanguageSettings window now shows input languages based on their
"filetype" value andfiles in "profiles" folder.

[EGD-4712] Change quickstart.md to reflect current project state

Quickstart documentation was a bit out-of-date, thus containing some
minor inaccuracies. Also document didn't actually reflect desired
sequence of user actions.

[EGD-5092] Add instructions to development_workflow

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