Based on #1534
Figured this should be in place so we can work on other front-end things
with these, rather than dealing with refactoring later
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### Changes
- Adds `ArchivedItemPage` and `ArchivedItemPageComment` types from #1534
(thank you @SuaYoo!)
- Adds typedefs for match and resource count properties
- sets properties optional in the db schema to optional in the type as
well
### Manual testing
1.
### Screenshots
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