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/workflows/brownfield-fullstack.yml

@@ -2,7 +2,7 @@ workflow:
   id: brownfield-fullstack
   name: Brownfield Full-Stack Enhancement
   description: >-
-    Agent workflow for enhancing existing full-stack applications with new features, 
+    Agent workflow for enhancing existing full-stack applications with new features,
     modernization, or significant changes. Handles existing system analysis and safe integration.
   type: brownfield
   project_types:
@@ -70,7 +70,7 @@ workflow:
         A[Start: Brownfield Enhancement] --> B{Enhancement Complexity?}
         B -->|Complex/Significant| C[analyst: analyze existing project]
         B -->|Simple| D{1 Story or 2-3 Stories?}
-        
+
         C --> E[pm: brownfield-prd.md]
         E --> F[architect: brownfield-architecture.md]
         F --> G[po: validate with po-master-checklist]
@@ -78,12 +78,12 @@ workflow:
         H -->|Yes| I[Return to relevant agent for fixes]
         H -->|No| J[Move to IDE Environment]
         I --> G
-        
+
         D -->|1 Story| K[pm/po/sm: brownfield-create-story]
         D -->|2-3 Stories| L[pm/po/sm: brownfield-create-epic]
         K --> M[Move to IDE Environment]
         L --> M
-        
+
         style J fill:#90EE90
         style M fill:#90EE90
         style E fill:#FFE4B5