added file authors.tex in metadata module copied from jcls template repository

Closes #5 (closed)

metadata/authors.tex

+%
+%
+% Add Information for authors and the respective affiliations 
+% The data format follows loosly the JATS specifications.  
+%
+% The content of this file will be omitted for reviewing.
+% For submission, no anonymization is necessary
+%
+
+% \author{                                  % One entry for each author
+%   orcid = 0000-0000-0000-0000,            % 
+%   surname = Lastname,                     % 
+%   given-names = First Second,             % 
+%   affiliation = someid,                   % An affiliation with the same ID must be given 
+%   email = email.address@somedomain.edu    %
+%   contribution = Conceptualization        % Multiple terms following the CrediT specifications 
+%                                           % can be made: https://credit.niso.org 
+% }
+%
+% \affiliation{
+%   id = someid,                            % The ID can be assigned to multiple authors
+%   department = Institute for curious research,
+%   organization = University of Somewhere,
+%   city = Somewhere
+% }
+%
+%
+
+\author{                      
+  orcid = 0000-0000-0000-0001,
+  surname = Musterfrau,
+  given-names = Marie,
+  affiliation = su,        
+  email = marie.musterfrau@someuniversity.edu,
+  contribution = {Conceptualization, Writing – original draft}
+}
+
+\author{                       
+  orcid = 0000-0000-0000-0002,
+  surname = Esempio,
+  given-names = Ben,
+  affiliation = su,         
+  email = ben.esempiosomeuniversity.edu,
+%  contribution = {Formal Analysis, Writing – review \& editing}
+}
+
+\affiliation{
+  id = su,                  
+  department = Institute for curious research,
+  organization = Some University,
+  city = Somecity
+}
+
+\author{                        
+  orcid = 0000-0000-0000-0003,
+  surname = Example,
+  given-names = Eric,
+  affiliation = au,          
+  email = eric.example@anotheruni.edu,
+  contribution = {Methodology, Project administration}
+}
+
+\affiliation{
+  id = au,                 
+  department = Super Department,
+  organization = Another University,
+  city = Anotherville
+}
\ No newline at end of file