chore: add BMAD agent workflows and configuration system

- Add comprehensive agent workflow definitions for 8 specialized roles (analyst, architect, developer, product manager, scrum master, technical writer, UX designer, QA engineer)
- Add 35+ workflow definitions covering analysis, planning, solutioning, and implementation phases
- Add BMAD configuration system with agent, task, tool, workflow, and file manifests
- Add BMM (Business Model Methodology) documentation including quick-start guides, architecture references, and workflow analysis
- Add test architecture knowledge base with 20+ testing patterns and best practices
- Add team configuration templates and party mode setup for collaborative development
- Establish foundation for enterprise agentic development framework with adaptive scaling capabilities

.bmad/bmm/workflows/4-implementation/retrospective/workflow.yaml

@@ -0,0 +1,56 @@
+# Retrospective - Epic Completion Review Workflow
+name: "retrospective"
+description: "Run after epic completion to review overall success, extract lessons learned, and explore if new information emerged that might impact the next epic"
+author: "BMad"
+
+config_source: "{project-root}/.bmad/bmm/config.yaml"
+output_folder: "{config_source}:output_folder"
+user_name: "{config_source}:user_name"
+communication_language: "{config_source}:communication_language"
+user_skill_level: "{config_source}:user_skill_level"
+document_output_language: "{config_source}:document_output_language"
+date: system-generated
+sprint_artifacts: "{config_source}:sprint_artifacts"
+
+installed_path: "{project-root}/.bmad/bmm/workflows/4-implementation/retrospective"
+template: false
+instructions: "{installed_path}/instructions.md"
+
+required_inputs:
+  - agent_manifest: "{project-root}/.bmad/_cfg/agent-manifest.csv"
+
+# Smart input file references - handles both whole docs and sharded docs
+# Priority: Whole document first, then sharded version
+# Strategy: SELECTIVE LOAD - only load the completed epic and relevant retrospectives
+input_file_patterns:
+  epics:
+    description: "The completed epic for retrospective"
+    whole: "{output_folder}/*epic*.md"
+    sharded_index: "{output_folder}/*epic*/index.md"
+    sharded_single: "{output_folder}/*epic*/epic-{{epic_num}}.md"
+    load_strategy: "SELECTIVE_LOAD"
+  previous_retrospective:
+    description: "Previous epic's retrospective (optional)"
+    pattern: "{sprint_artifacts}/**/epic-{{prev_epic_num}}-retro-*.md"
+    load_strategy: "SELECTIVE_LOAD"
+  architecture:
+    description: "System architecture for context"
+    whole: "{output_folder}/*architecture*.md"
+    sharded: "{output_folder}/*architecture*/*.md"
+    load_strategy: "FULL_LOAD"
+  prd:
+    description: "Product requirements for context"
+    whole: "{output_folder}/*prd*.md"
+    sharded: "{output_folder}/*prd*/*.md"
+    load_strategy: "FULL_LOAD"
+  document_project:
+    description: "Brownfield project documentation (optional)"
+    sharded: "{output_folder}/*.md"
+    load_strategy: "INDEX_GUIDED"
+
+# Required files
+sprint_status_file: "{sprint_artifacts}/sprint-status.yaml || {output_folder}/sprint-status.yaml"
+story_directory: "{sprint_artifacts}"
+retrospectives_folder: "{sprint_artifacts}"
+
+standalone: true