request searching only works on full match
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### Checklist
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### Description
The newly introduced search function only returns a result when the full name of the pkgbase is entered.
### Reproduction
Currently the search field is a full string matching:
so [searching for "python-quamash"](https://aur.archlinux.org/requests?filter_pending=True&filter_pkg_name=python-quamash+) has the expected request for [python-quamash](https://aur.archlinux.org/pkgbase/python-quamash) while searching for "python" gives no result.
This would be great to change since the current behaviour unexpected and also this would allow Package Maintainers to communicate about groups of requests more easily. (Background: Someone filed a few deletion requests against Intel OneAPI packages.)
Sadly I didnt catch this while testing the feature!
### Version(s)
Version [v6.2.4](https://gitlab.archlinux.org/archlinux/aurweb/-/commits/v6.2.4)
Since it includes the related MR https://gitlab.archlinux.org/archlinux/aurweb/-/merge_requests/706
issue