Move some JS code from `fomantic.js` to standalone files (#27994) (#28001)
Backport #27994 by @wxiaoguang
To improve maintainability, this PR:
1. Rename `web_src/js/modules/aria` to `web_src/js/modules/fomantic`
(the code there are all for aria of fomantic)
2. Move api/transition related code to
`web_src/js/modules/fomantic/api.js` and
`web_src/js/modules/fomantic/transition.js`
No logic is changed.
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
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