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/bmm/workflows/document-project/workflow.yaml

@@ -0,0 +1,22 @@
+# Document Project Workflow Configuration
+name: "document-project"
+version: "1.2.0"
+description: "Analyzes and documents brownfield projects by scanning codebase, architecture, and patterns to create comprehensive reference documentation for AI-assisted development"
+author: "BMad"
+
+# Critical variables
+config_source: "{project-root}/_bmad/bmm/config.yaml"
+output_folder: "{config_source}:project_knowledge"
+user_name: "{config_source}:user_name"
+communication_language: "{config_source}:communication_language"
+document_output_language: "{config_source}:document_output_language"
+user_skill_level: "{config_source}:user_skill_level"
+date: system-generated
+
+# Module path and component files
+installed_path: "{project-root}/_bmad/bmm/workflows/document-project"
+instructions: "{installed_path}/instructions.md"
+validation: "{installed_path}/checklist.md"
+
+# Required data files - CRITICAL for project type detection and documentation requirements
+documentation_requirements_csv: "{installed_path}/documentation-requirements.csv"