docs(usability): reorganize README.md tools by category — move get_activities and like_post to Wall & Activities (v1.4.4)

- Consolidate wall post and activity tools in dedicated section
- Remove duplicate entries from Lists & Tasks
- Update README version header to v1.4.3
- Bump pyproject.toml to v1.4.4
- Fix unused import in find_category_param.py

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "mcp-familywall"
-version = "1.4.3"
+version = "1.4.4"
 description = "MCP server for Family Wall — manage your family's circles, lists, tasks, recipes, and meal plan via Claude"
 readme = "README.md"
 requires-python = ">=3.12"