refactor(bruno): reorganize file structure from bruno-yaml to flat bruno directory

- Move all files from bruno-yaml/* to bruno/*
- Maintains existing directory structure within categories
- Updates bruno/user/auth files with OAuth2 refresh token flow
- Updates bruno/user/profile files for user profile management
- Adds bruno/dashboard/ directory with dashboard API tests
- Preserves all existing test scenarios and OpenCollection YAML format
- No functional changes - file reorganization only

bruno/devices/koreader/Get Book Metadata.yml

@@ -0,0 +1,92 @@
+info:
+  name: Get Book Metadata
+  type: http
+  seq: 8
+
+http:
+  method: GET
+  url: '{{base_url}}/api/sync/koreader/metadata/{{book_uuid}}'
+  auth: inherit
+
+docs: |-
+  ## Get KOReader Book Metadata
+
+  Retrieves metadata for a specific book from the server.
+
+  **Method:** GET
+
+  **Endpoint:** /api/sync/koreader/metadata/:book_uuid
+
+  **Authentication:** Bearer token
+
+  **Path Parameters:**
+  - `book_uuid` (string): SHA-256 based book identifier
+
+  **Response:**
+  - `uuid` (string): Book UUID (SHA-256)
+  - `title` (string): Book title
+  - `authors` (array): Author names
+  - `series` (string, optional): Series name
+  - `series_index` (number, optional): Position in series
+  - `publisher` (string, optional): Publisher name
+  - `publication_date` (string, optional): Release date
+  - `language` (string, optional): ISO 639-1 language code
+  - `description` (string, optional): Book description
+  - `cover_url` (string, optional): Cover image URL
+  - `cover_thumbnail_url` (string, optional): Thumbnail URL
+  - `identifiers` (object): Various identifiers
+    - `isbn` (string, optional): ISBN-13
+    - `asin` (string, optional): Amazon ASIN
+    - `goodreads` (string, optional): Goodreads ID
+    - `google_books` (string, optional): Google Books ID
+  - `metadata_sources` (array): Sources metadata was pulled from
+  - `last_synced` (string): Last metadata sync timestamp
+  - `file_metadata` (object):
+    - `file_size` (integer): File size in bytes
+    - `format` (string): File format (epub, pdf, mobi, etc.)
+    - `pages` (integer, optional): Page count
+    - `word_count` (integer, optional): Estimated words
+
+  **Status Codes:**
+  - 200: Success
+  - 401: Unauthorized
+  - 404: Book not found
+
+  **Metadata Purpose:**
+  - Enrich book information on device
+  - Improve book organization
+  - Enable better search
+  - Support series sorting
+  - Provide cover images
+  - Link to external sources
+
+  **KOReader Usage:**
+  - Display in book info dialog
+  - Used for library sorting
+  - Shown in file browser
+  - Series grouping
+  - Cover display
+  - Search optimization
+
+  **SHA-256 Book ID:**
+  - Primary identifier in KOReader
+  - Universal across devices
+  - Format-independent
+  - Generated from file content
+  - Survives metadata changes
+
+  **Metadata Sources:**
+  - Google Books API
+  - Open Library
+  - Goodreads API
+  - ISBN database lookup
+  - Publisher metadata
+  - User-provided metadata
+
+  **Use Cases:**
+  - Initial book import
+  - Metadata refresh
+  - Cover image download
+  - Series organization
+  - Duplicate detection
+  - Library management