Refactor: Convert PID tuning tab to Nuxt UI (betaflight#5007)

* Convert PidTuningTab to Nuxt UI

* Convert PidTuningTab.vue to Nuxt UI

* Convert FilterSubTab.vue to Nuxt UI

* Convert PidSubTab.vue to Nuxt UI

* Styling updates for FilterSubTab

* Styling update for PidSubTab

* Convert RatesSubTab.vue to Nuxt UI

* Additional styling improvements

* Add link to metamarc

Author: haslinghuis