chore: add code formatting config and pre-commit hooks (#450)

common/utils/bmad-doc-template.md

@@ -14,7 +14,7 @@ template:
   output:
     format: markdown
     filename: default-path/to/{{filename}}.md
-    title: "{{variable}} Document Title"
+    title: '{{variable}} Document Title'
 
 workflow:
   mode: interactive
@@ -108,8 +108,8 @@ sections:
 Use `{{variable_name}}` in titles, templates, and content:
 
 ```yaml
-title: "Epic {{epic_number}} {{epic_title}}"
-template: "As a {{user_type}}, I want {{action}}, so that {{benefit}}."
+title: 'Epic {{epic_number}} {{epic_title}}'
+template: 'As a {{user_type}}, I want {{action}}, so that {{benefit}}.'
 ```
 
 ### Conditional Sections
@@ -212,7 +212,7 @@ choices:
         - id: criteria
           title: Acceptance Criteria
           type: numbered-list
-          item_template: "{{criterion_number}}: {{criteria}}"
+          item_template: '{{criterion_number}}: {{criteria}}'
           repeatable: true
 ```
 
@@ -220,7 +220,7 @@ choices:
 
 ````yaml
 examples:
-  - "FR6: The system must authenticate users within 2 seconds"
+  - 'FR6: The system must authenticate users within 2 seconds'
   - |
     ```mermaid
     sequenceDiagram