Draft: Resolve "Update TypeORM"

Closes #442

TODO:

• (log) Debug integration test (fails when copying questionnaire) (when copying, MultipleChoiceQuestions are not loaded with their corresponding options while CheckboxQuestions are loaded with their options. These relations are both eager, not sure where the issue lies)
• (log) Debug email test (fails, currently skipped) (seems to be some sort of issue with a circular dependency, https://stackoverflow.com/questions/43176006/typeerror-class-extends-value-undefined-is-not-a-function-or-null and https://stackoverflow.com/questions/75733102/typescript-javascript-circular-dependency-class-extends-value-undefined-is-not)

DONE:

• Seeder functions properly
• Application functions properly
• CLI commands are updated to new TypeORM syntax