feat: add DistrictListing and DistrictSelection components with detailed documentation - Introduced DistrictListing component for displaying and selecting forest districts with search functionality and preference persistence. - Created DistrictSelection component as a flexible shell for managing selectable lists, supporting custom query hooks and filter functions. - Added EmptySection component for consistent empty state presentation across the app. - Developed PageTitle component for shared page headers, including breadcrumb navigation and under-construction tags. - Implemented Subtitle component for consistent secondary text styling. - Added various Tag components (ColorTag, DateTag, EmptyValueTag, UnderConstructionTag, YesNoTag) for displaying status and value representations. - Comprehensive documentation provided for all new components, detailing props, usage, and styling.