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/tools/note-tools.ts

@@ -82,6 +82,17 @@ export class NoteTools {
 
 			// If no special options, return simple content
 			if (!parseFrontmatter) {
+				// Compute word count when returning content
+				if (withContent) {
+					const wordCount = ContentUtils.countWords(content);
+					const result = {
+						content,
+						wordCount
+					};
+					return {
+						content: [{ type: "text", text: JSON.stringify(result, null, 2) }]
+					};
+				}
 				return {
 					content: [{ type: "text", text: content }]
 				};
@@ -110,6 +121,11 @@ export class NoteTools {
 				result.contentWithoutFrontmatter = extracted.contentWithoutFrontmatter;
 			}
 
+			// Add word count when content is included
+			if (withContent) {
+				result.wordCount = ContentUtils.countWords(content);
+			}
+
 			return {
 				content: [{ type: "text", text: JSON.stringify(result, null, 2) }]
 			};