Alan Guo Xiang Tan 141555136a
DEV: Support filtering by date columns on /filter route (#21233)
This commit adds support for the following date filters:

1. `activity-before:<YYYY-MM-DD>` which filters for topics that have been bumped at or before given date
2. `activity-after:<YYYY-MM-DD>` which filters for topics that have been bumped at or after given date
3. `created-before:<YYYY-MM-DD>` which filters for topics that have been created at or before given date
4. `created-after:<YYYY-MM-DD>` which filters for topics that have been created at or after given date
5. `latest-post-before:<YYYY-MM-DD>` which filters for topics with the
latest post posted at or before given date
6. `latest-post-after:<YYYY-MM-DD>` which filters for topics with the
latest post posted at or after given date

If the filter has an invalid value, i.e string that cannot be converted
into a proper date in the `YYYY-MM-DD` format, the filter will be ignored.

If either of each filter is specify multiple times, only the last
occurrence of each filter will be taken into consideration.
2023-04-27 15:43:47 +08:00
..
2023-04-26 19:41:34 +02:00