move files from 'docs' to existing 'doc' directory

.cursor-markdown-rules.md

@@ -181,26 +181,26 @@ Brief description of the document's purpose and scope.
 ### Check Single File
 
 ```bash
-npx markdownlint docs/filename.md
+npx markdownlint doc/filename.md
 ```
 
 ### Check All Documentation
 
 ```bash
-npx markdownlint docs/
+npx markdownlint doc/
 ```
 
 ### Auto-fix Common Issues
 
 ```bash
 # Remove trailing spaces
-sed -i 's/[[:space:]]*$//' docs/filename.md
+sed -i 's/[[:space:]]*$//' doc/filename.md
 
 # Remove multiple blank lines
-sed -i '/^$/N;/^\n$/D' docs/filename.md
+sed -i '/^$/N;/^\n$/D' doc/filename.md
 
 # Add newline at end if missing
-echo "" >> docs/filename.md
+echo "" >> doc/filename.md
 ```
 
 ## Common Patterns