refactor: nest Claude Code commands under BMad subdirectory (#307)

- Update installer config to use .claude/commands/BMad/ path
- Modify setupClaudeCode function to create nested directory structure
- Update documentation and upgrader to reflect new command location
- Improves organization by grouping all BMad commands together

docs/agentic-tools/claude-code-guide.md

@@ -7,7 +7,7 @@ For the complete workflow, see the [BMad Workflow Guide](../bmad-workflow-guide.
 When running `npx bmad-method install`, select **Claude Code** as your IDE. This creates:
 
 - `.bmad-core/` folder with all agents
-- `.claude/commands/` folder with agent command files (`.md`)
+- `.claude/commands/BMad` folder with agent command files (`.md`)
 
 ## Using BMad Agents in Claude Code
 

tools/installer/config/install.config.yaml

@@ -21,7 +21,7 @@ ide-configurations:
       # 3. The agent will adopt that persona for the conversation
   claude-code:
     name: Claude Code
-    rule-dir: .claude/commands/
+    rule-dir: .claude/commands/BMad/
     format: multi-file
     command-suffix: .md
     instructions: |

tools/installer/lib/ide-setup.js

@@ -131,7 +131,7 @@ class IdeSetup {
   }
 
   async setupClaudeCode(installDir, selectedAgent) {
-    const commandsDir = path.join(installDir, ".claude", "commands");
+    const commandsDir = path.join(installDir, ".claude", "commands", "BMad");
     const agents = selectedAgent ? [selectedAgent] : await this.getAllAgentIds(installDir);
 
     await fileManager.ensureDirectory(commandsDir);

tools/upgraders/v3-to-v4-upgrader.js

@@ -558,7 +558,7 @@ class V3ToV4Upgrader {
     try {
       const ideMessages = {
         cursor: "Rules created in .cursor/rules/",
-        "claude-code": "Commands created in .claude/commands/",
+        "claude-code": "Commands created in .claude/commands/BMad/",
         windsurf: "Rules created in .windsurf/rules/",
         trae: "Rules created in.trae/rules/",
         roo: "Custom modes created in .roomodes",