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/utils/template-format.md

@@ -6,7 +6,7 @@ Templates in the BMAD method use standardized markup for AI processing. These co
 
 - **{{placeholders}}**: Variables to be replaced with actual content
 - **[[LLM: instructions]]**: Internal processing instructions for AI agents (never shown to users)
-- **<<REPEAT>>** sections: Content blocks that may be repeated as needed
+- **REPEAT** sections: Content blocks that may be repeated as needed
 - **^^CONDITION^^** blocks: Conditional content included only if criteria are met
 - **@{examples}**: Example content for guidance (never output to users)
 
@@ -23,4 +23,4 @@ Templates in the BMAD method use standardized markup for AI processing. These co
 - **NEVER display template markup, LLM instructions, or examples to users**
 - Template elements are for AI processing only
 - Focus on faithful template execution and clean output
-- All template-specific instructions are embedded within templates
+- All template-specific instructions are embedded within templates