ScratchpadにUIインスペクターを追加 (#14565)

* add ui list

* Update scratchpad.vue

* experiment

* design change

* redesign

* redesign

* Update ja-JP.yml

* redesign

* component properties

* whole json

* use textarea

* fix import

* stringify function

* Update CHANGELOG.md

* UI Component Monitor -> UI Inspector

* uiInspectorOpenedFlags -> uiInspectorOpenedComponents

Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>

* fix

* change key i -> c.value.id

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Co-authored-by: syuilo <4439005+syuilo@users.noreply.github.com>