feat: replace form helper functions with components in admin template

app/Controllers/PostController.php

app/Entities/EpisodeComment.php

app/Language/en/Fediverse.php

app/Language/fr/Fediverse.php

app/Libraries/ViewComponents/Component.php

app/Resources/images/castopod-logo-base.svg

app/Resources/images/castopod-logo.svg

app/Resources/images/castopod-mascot_confused.svg

app/Resources/js/modules/Clipboard.ts

app/Resources/js/modules/ThemePicker.ts

app/Resources/styles/breadcrumb.css

app/Resources/styles/switch.css

app/Views/Components/Alert.php

app/Views/Components/Button.php

app/Views/Components/Forms/Checkbox.php

app/Views/Components/Forms/DatetimePicker.php

app/Views/Components/Forms/FormComponent.php

app/Views/Components/Forms/Helper.php

app/Views/Components/Forms/Input.php

app/Views/Components/Forms/Label.php