Modify report.test.ts to be able to generate the zip file from some xml

[2byrds]

• The xml should NOT come from a file, instead it should be generated. Keep it fairly simple but See the xbrl example here
• There should be a utility method that takes the generated xml, creates the file, then creates a report.json, and zips them together.
• There should be a test-case-zip where the xml content is static, for a predictable digest.
• There should be a test-case-zip where the xml content has some randomness in order to generate a different digest each time, probably just adding a millisecond timestamp will be sufficient.