As an organized person, I want a calendar that is able to organize events into catagories that I have set myself

In existing calendars apps, this is primary done through having separate calendars, which can be imported or exported

No files, tests, or entry points are named in the issue. Start by locating the calendar event and import/export handling in the TypeScript project, then clarify how user-defined categories are created and assigned. Done should support organizing events into those categories while retaining the stated import/export behavior.

Written by the indexing model from the issue text.