Initial commit: BMAD framework + Story 1.1 Component Trait Definition

Features:
- BMAD (Build Modular AI-driven Development) framework setup
- BMM, BMB, CIS, Core modules configured
- Story 1.1: Component trait with error handling
- Workspace Cargo.toml with components crate
- 31 tests passing (19 unit + 12 doc tests)

Technical:
- Component trait with compute_residuals, jacobian_entries, n_equations
- ComponentError enum with thiserror
- JacobianBuilder for sparse matrix construction
- Object-safe trait supporting Box<dyn Component>
- Comprehensive documentation and examples

_bmad/bmb/workflows/module/templates/workflow-spec-template.md

@@ -0,0 +1,96 @@
+# Workflow Specification: {workflow_name}
+
+**Module:** {module_code}
+**Status:** Placeholder — To be created via create-workflow workflow
+**Created:** {date}
+
+---
+
+## Workflow Overview
+
+**Goal:** {workflow_goal}
+
+**Description:** {workflow_description}
+
+**Workflow Type:** {workflow_type}
+
+---
+
+## Workflow Structure
+
+### Entry Point
+
+```yaml
+---
+name: {workflow_name}
+description: {workflow_description}
+web_bundle: true
+installed_path: '{project-root}/_bmad/{module_code}/workflows/{workflow_folder_name}'
+---
+```
+
+### Mode
+
+- [ ] Create-only (steps-c/)
+- [ ] Tri-modal (steps-c/, steps-e/, steps-v/)
+
+---
+
+## Planned Steps
+
+| Step | Name | Goal |
+|------|------|------|
+{workflow_steps_table}
+
+---
+
+## Workflow Inputs
+
+### Required Inputs
+
+{required_inputs}
+
+### Optional Inputs
+
+{optional_inputs}
+
+---
+
+## Workflow Outputs
+
+### Output Format
+
+- [ ] Document-producing
+- [ ] Non-document
+
+### Output Files
+
+{output_files}
+
+---
+
+## Agent Integration
+
+### Primary Agent
+
+{primary_agent}
+
+### Other Agents
+
+{other_agents}
+
+---
+
+## Implementation Notes
+
+**Use the create-workflow workflow to build this workflow.**
+
+Inputs needed:
+- Workflow name and description
+- Step structure and sequence
+- Input/output specifications
+- Agent associations
+
+---
+
+_Spec created on {date} via BMAD Module workflow_