Add core data structures for Buildings and Rooms (v0.1.0)

Phase 1 implementation includes:
- Custom Post Type: Buildings with address, contact, and details meta
- Custom Post Type: Rooms with building relationship and gallery
- Custom Taxonomy: Room Types (hierarchical)
- Custom Taxonomy: Amenities (non-hierarchical with icons)
- Admin columns, filters, and status badges
- Gallery meta box with media library integration

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

CLAUDE.md

@@ -215,8 +215,14 @@ wp-bnb/
 │       └── release.yml     # CI/CD release pipeline
 ├── src/                    # PHP source code (PSR-4: Magdev\WpBnb)
 │   ├── Plugin.php          # Main plugin singleton
-│   └── License/
-│       └── Manager.php     # License management
+│   ├── License/
+│   │   └── Manager.php     # License management
+│   ├── PostTypes/          # Custom post types
+│   │   ├── Building.php    # Building post type
+│   │   └── Room.php        # Room post type
+│   └── Taxonomies/         # Custom taxonomies
+│       ├── Amenity.php     # Amenity taxonomy (tags)
+│       └── RoomType.php    # Room type taxonomy (categories)
 ├── lib/                    # Git submodules
 │   └── wc-licensed-product-client/  # License client library
 ├── vendor/                 # Composer dependencies (auto-generated)
@@ -303,3 +309,44 @@ Admin features always work; frontend requires valid license.
 - Settings page uses tabs with nonce-protected form submission
 - AJAX handlers require `check_ajax_referer()` and `current_user_can()` checks
 - CI/CD workflow excludes `lib/` directory but includes `vendor/` in releases
+
+### 2026-01-31 - Version 0.1.0 (Core Data Structures)
+
+**Completed:**
+
+- Created Custom Post Type: Buildings (`bnb_building`)
+  - Address meta box with full address fields
+  - Contact meta box with phone, email, website
+  - Details meta box with rooms count, floors, year built, check-in/out times
+  - Custom admin columns (city, country, room count)
+  - Sortable columns and country dropdown
+- Created Custom Post Type: Rooms (`bnb_room`)
+  - Building relationship via meta field
+  - Room details: number, floor, size, capacity, beds, bathrooms
+  - Room status with color-coded badges
+  - Image gallery with media library and drag-and-drop sorting
+  - Building filter dropdown in admin list
+  - Custom admin columns with building link
+- Created Custom Taxonomy: Room Types (`bnb_room_type`)
+  - Hierarchical structure with parent/child support
+  - Base capacity and sort order meta fields
+  - Default terms with subtypes (Standard > Single/Double/Twin, etc.)
+- Created Custom Taxonomy: Amenities (`bnb_amenity`)
+  - Non-hierarchical (tag-like) structure
+  - Dashicon selection for visual display
+  - Icon column in taxonomy list
+  - Default amenities: WiFi, Parking, Breakfast, etc.
+- Updated Plugin class to register post types and taxonomies
+- Enhanced admin assets for post type edit screens
+- Added gallery JavaScript with media library integration
+- Updated activation hook to register CPTs before flushing rewrites
+- Updated version to 0.1.0
+
+**Learnings:**
+
+- Taxonomies must be registered before post types that use them
+- `show_in_menu => 'wp-bnb'` adds post types under the plugin's main menu
+- Room-building relationship uses post meta, not hierarchical post types
+- Gallery implementation uses `wp.media` frame with multiple selection
+- Admin assets need conditional loading based on both hook suffix and post type
+- Status badges use inline styles for color coding (avoiding extra CSS complexity)