Add a way to search for jobs using some specific wckey

[mehdid]

With #141, it became possible to click on a used wckey to use it as a filter in the jobs view. Another required method is to be able to enter the desired wckey directly into the search box (the same for other searchable fields).

[rezib]

This issue concerns Slurm-web v2 which is not maintained anymore. You are highly encouraged to test the new version v3.0.0 for which the quick start guide is available online: https://docs.rackslab.io/slurm-web/install/quickstart.html

Unless someone is motivated to maintain the old version of Slurm-web or you have a justified reason to keep this issue open, it will be closed in a few weeks.

[rezib]

For the reasons explained in the previous comment, I finally close this issue.