Fix/windows dev fixes#25

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tdn wants to merge 3 commits intomu-semtech:masterfrom

tdn:fix/windows-dev-fixes

Commits on May 7, 2021

Added gitattributes and editorconfig to ensure windows devs check out lf
tdn
committed
Added DEV_OS option to enable -watch-legacy for windows users
tdn
committed

Commits on Jan 4, 2023

Merge branch 'master' of github.com:tdn/mu-javascript-template into fix/windows-dev-fixes
tdn
committed