feat(portal): implement end-to-end App Config CRUD, search, sorting, and HeroUI v3 checkbox fixes

[yashashkumar]

Why

Achieve full feature parity for App Config in apps/portal with backend API endpoints and existing desktop/web capabilities.

What

• API Services & Queries: Extended appConfigService and appConfigQuery in portal to support getById, update, deleteBulk, and full getAll filtering params (search, sortBy, sort, page, perPage).
• Portal UI Implementation: Built end-to-end App Config management with debounced search bar, sortable table columns, multi-select checkboxes, bulk deletion modal, creation modal, edit modal, and pagination.
• HeroUI v3 Checkbox Fixes: Solved HeroUI v3 Checkbox rendering and press responder handling by properly wrapping <Checkbox.Control> and <Checkbox.Indicator> inside <Checkbox.Content> and binding Table selectionMode.
• Code Modularization: Refactored component structure into AppConfigTable, CreateConfigModal, and EditConfigModal to satisfy fta-cli complexity limits.