Add email and certificates parsing functionality.

javascript/package.json

javascript/src/constants/authentication.js

javascript/src/constants/certificates.js

javascript/src/helpers/mailparser.js

javascript/src/iframe/viamapi-iframe.js

javascript/src/utilities/dateTimeUtilities.js

javascript/src/utilities/emailUtilities.js

javascript/src/utilities/signingUtilities.js

javascript/yarn.lock