Introduced a new eslint.config.js using neostandard and added related devDependencies. Updated codebase for consistent formatting, spacing, and function declarations. Minor refactoring and cleanup across multiple files to improve readability and maintain code style compliance.
Moved various helper, event, and utility files from napcat-common to napcat-core/helper for better modularity and separation of concerns. Updated imports across packages to reflect new file locations. Removed unused dependencies from napcat-common and added them to napcat-core where needed. Also consolidated type definitions and cleaned up tsconfig settings for improved compatibility.
Moved file element creation methods (for file, picture, video, and ptt) from napcat-core/apis/file.ts to a new OneBotFileApi class in napcat-onebot/api/file.ts. Updated package.json dependencies to remove unused packages and fix workspace references. This improves separation of concerns and modularity between core and onebot-specific logic.
