feat: add word count support for read operations

Extended word count functionality to read operations (read_note, stat, list) to complement existing write operation support.

Changes:
- read_note: Now automatically includes wordCount when returning content (with withContent or parseFrontmatter options)
- stat: Added optional includeWordCount parameter with performance warning
- list: Added optional includeWordCount parameter with performance warning
- All operations use same word counting rules (excludes frontmatter and Obsidian comments)
- Best-effort error handling for batch operations

Technical details:
- Updated ParsedNote and FileMetadata type definitions to include optional wordCount field
- Added comprehensive test coverage (18 new tests)
- Updated tool descriptions with usage notes and performance warnings
- Updated CHANGELOG.md to document new features in version 1.1.0

src/types/mcp-types.ts

@@ -73,6 +73,7 @@ export interface FileMetadata {
 	size: number;
 	modified: number;
 	created: number;
+	wordCount?: number;
 }
 
 export interface DirectoryMetadata {
@@ -181,6 +182,7 @@ export interface ParsedNote {
 	parsedFrontmatter?: Record<string, any>;
 	content: string;
 	contentWithoutFrontmatter?: string;
+	wordCount?: number;
 }
 
 /**