adding git attributes file to keep LF line endings for correct sha on windows system instead of CRLF
adding git attributes file to keep LF line endings for correct sha on windows system instead of CRLF

dleehr/common-workflow-language,StarvingMarvin/common-workflow-language,common-workflow-language/common-workflow-language,dleehr/common-workflow-language,hmenager/common-workflow-language,common-workflow-language/common-workflow-language,StarvingMarvin/common-workflow-language,dleehr/common-workflow-language,dleehr/common-workflow-language,mr-c/common-workflow-language,hmenager/common-workflow-language,curoverse/common-workflow-language,StarvingMarvin/common-workflow-language,curoverse/common-workflow-language,common-workflow-language/common-workflow-language,hmenager/common-workflow-language,StarvingMarvin/common-workflow-language,common-workflow-language/common-workflow-language,mr-c/common-workflow-language,hmenager/common-workflow-language,mr-c/common-workflow-language