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/generate-project-context/project-context-template.md

@@ -0,0 +1,21 @@
+---
+project_name: '{{project_name}}'
+user_name: '{{user_name}}'
+date: '{{date}}'
+sections_completed: ['technology_stack']
+existing_patterns_found: { { number_of_patterns_discovered } }
+---
+
+# Project Context for AI Agents
+
+_This file contains critical rules and patterns that AI agents must follow when implementing code in this project. Focus on unobvious details that agents might otherwise miss._
+
+---
+
+## Technology Stack & Versions
+
+_Documented after discovery phase_
+
+## Critical Implementation Rules
+
+_Documented after discovery phase_