chore: bump version to v0.2.1

chore: bump version to v0.2.0

Release v0.1.0 - Initial release

Features:
- Flashcard learning with SM-2 spaced repetition algorithm
- Add vocabulary from editor selection
- Visual dashboard with heatmap, donut charts, and progress tracking
- Multiple TTS engines (Youdao, Google, Browser, Azure, OpenAI)
- Export/Import backup functionality
- MCP Server for AI assistant integration (Claude Desktop, VS Code Copilot)
- Knowledge graph visualization
- Bulk import from JSON

feat(mcp): enhance list_cards with advanced search capabilities

- Add fullTextSearch: search across all fields (term, translation, explanation, example, synonyms, antonyms, notes, tags)
- Add tags/tagsMatchAll: multi-tag filtering with OR/AND logic
- Add type filter: filter by card type (word/phrase/sentence)
- Add createdAfter/createdBefore: date range filtering
- Add sortBy/sortOrder: sorting options (createdAt, updatedAt, term)
- Add offset: pagination support
- Add includeFullContent: option to return full card content
- Return total count in response for pagination

Bump version to v0.3.0

fix(mcp): correct storage path to match VS Code extension

- Changed default storage path from wordslash.wordslash to terateams.wordslash
- Path format: globalStorage/<publisher>.<extension-name>
- Bump version to 0.2.1