Corrected event settings components to use Svelte 5 bindable props for two-way data binding. This ensures that changes in child form components (ae_comp__event_settings_form.svelte, ae_comp__event_settings_pres_mgmt_form.svelte) are reactively reflected in the parent page (settings/+page.svelte) and properly handled during save operations.
This commit introduces form-based UI components for editing the 'cfg_json' and 'mod_pres_mgmt_json' fields on the event settings page. This provides a more user-friendly experience than editing the raw JSON directly. It also fixes an issue where the JSON objects were being displayed as '[object Object]'.
This commit introduces a new page at /events/[event_id]/settings that allows users to view and edit the JSON configuration fields for an event. The page provides textareas for each config field and a 'Save' button to persist the changes.
