Document about thread in Zephyr

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Introduction about thread Command in zephyr to work with thread Example and explain

[baobuibk]

@Smeanuz
Trước khi push, em phải merge với cái remote master mới nhất trước Theo tutorial này nhé

https://stackoverflow.com/questions/47029731/git-get-latest-changes-before-pushing-a-branch

Go to master branch with: git checkout master

Update your local master with: git pull origin master

Resolve conflicts (if applicable)

Go back to features with: git checkout features

Merge master branch over features with: git merge master

Rebuild to check if all OK

Push changes with: git push origin features