refactor: standardize formatting and improve readability across core documents (#211)

### CHANGES

- Add newlines and spacing for improved readability
- Standardize instructional text for consistency
- Renumber lists within tasks for better clarity
- Add language identifiers to various code blocks
- Update placeholder text for improved consistency
- Adjust descriptions and wording in multiple files
- Update VS Code settings and dictionary words

.bmad-core/tasks/brownfield-create-story.md

@@ -55,8 +55,8 @@ Create a single focused story following this structure:
 
 #### User Story
 
-As a {{user type}},  
-I want {{specific action/capability}},  
+As a {{user type}},
+I want {{specific action/capability}},
 So that {{clear benefit/value}}.
 
 #### Story Context