[FEAT] Agent skills UI redesign (#1565)

* WIP agent settings redesign

* WIP rework new agent skill UI

* WIP save bar/agent styles

* WIP update settings fix

* desktop agent config UI implementation

* remove unneeded files

* fix sql and web browsing plugins not starting & add default badges

* fix serply merge conflict

* review: cleanup unused files/folders/components

* refactor components

* refactor components

* fix order of customized skills

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Co-authored-by: timothycarambat <rambat1010@gmail.com>