Use weighted algorithm for string matching when finding files in repo (#21370)
This PR is for:
* https://github.com/go-gitea/gitea/issues/20231
Now, when a user searches `word`, they always see `/{word}.txt` before
`/{w}e-g{o}t-{r}esult.{d}at`
Demo:
When searching "a", "a.ext" comes first.
Then when searching "at", the longer matched "template" comes first.
<details>
</details>
This PR also makes the frontend tests could import feature JS files by
introducing `jestSetup.js`
Co-authored-by: delvh <dev.lh@web.de>
Co-authored-by: silverwind <me@silverwind.io>
768e16dad1
