YOLOv3 general updates, improvements and fixes (#2011)

* YOLOv3 updates

* Add missing files

* Reformat

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Reformat

* Reformat

* Reformat

* Reformat

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>