Alan Guo Xiang Tan bc4a9c50f2
DEV: Support posts-min:<count> and posts-max:<count> on /filter (#21090)
This commit adds support for the `posts-min:<count>` and
`posts-max:<count>` filters for the topics filtering query language.
`posts-min:1` will filter for topics with at least a one post while
`posts-max:3` will filter foor topics with a maximum of 3 posts.

If the filter has an invalid value, i.e string that cannot be converted
into an integer, the filter will be ignored.

If either of each filter is specify multiple times, only the last
occurence of each filter will be taken into consideration.
2023-04-14 06:05:55 +08:00
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