chore: add BMAD workflow commands for Claude and Cursor

Include .claude/commands/ and .cursor/commands/ containing all BMAD
workflow definitions so team members can use them out of the box.
Only .claude/settings.local.json remains gitignored (user-specific).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/commands/bmad-review-edge-case-hunter.md

@@ -0,0 +1,10 @@
+---
+name: 'review-edge-case-hunter'
+description: 'Walk every branching path and boundary condition in content, report only unhandled edge cases. Orthogonal to adversarial review - method-driven not attitude-driven.'
+---
+
+# review-edge-case-hunter
+
+Read the entire task file at: {project-root}/_bmad/core/tasks/review-edge-case-hunter.xml
+
+Follow all instructions in the task file exactly as written.