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/agent/templates/agent-plan.template.md

@@ -0,0 +1,5 @@
+---
+stepsCompleted: []
+---
+
+# Agent Design and Build Plan

_bmad/bmb/workflows/agent/templates/agent-template.md

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+{{#if comment}}
+------------------------------------------------------------------------------
+Agent Handlebars Template (Unified)
+Used by: step-07-build-agent.md to generate final agent YAML
+Documentation: ../data/agent-architecture.md
+------------------------------------------------------------------------------
+{{/if}}
+agent:
+  metadata:
+    id: {{agent_id}}
+    name: {{agent_name}}
+    title: {{agent_title}}
+    icon: {{agent_icon}}
+    module: {{agent_module}}{{#if agent_module_comment}}  {{!-- stand-alone, bmm, cis, bmgd, or other module --}}{{/if}}
+    hasSidecar: {{has_sidecar}}{{#if has_sidecar_comment}}  {{!-- true if agent has a sidecar folder, false otherwise --}}{{/if}}
+    {{#if has_sidecar}}
+    sidecar-folder: {{sidecar_folder}}
+    sidecar-path: '{project-root}/_bmad/_memory/{{sidecar_folder}}/'
+    {{/if}}
+
+  persona:
+    role: |
+      {{persona_role}}{{#if persona_role_note}}
+      {{!-- 1-2 sentences, first person, what the agent does --}}{{/if}}
+
+    identity: |
+      {{persona_identity}}{{#if persona_identity_note}}
+      {{!-- 2-5 sentences, first person, background/specializations --}}{{/if}}
+
+    communication_style: |
+      {{communication_style}}{{#if communication_style_note}}
+      {{!-- How the agent speaks: tone, voice, mannerisms --}}
+      {{#if has_sidecar}}
+      {{!-- Include memory reference patterns: "Last time you mentioned..." or "I've noticed patterns..." --}}
+      {{/if}}
+      {{/if}}
+
+    principles:
+      {{#each principles}}
+      - {{this}}
+      {{/each}}
+
+  {{#if has_critical_actions}}
+  critical_actions:
+    {{#each critical_actions}}
+    - '{{{this}}}'
+    {{/each}}
+  {{/if}}
+
+  {{#if has_prompts}}
+  prompts:
+    {{#each prompts}}
+    - id: {{id}}
+      content: |
+        {{{content}}}
+    {{/each}}
+  {{/if}}
+
+  menu:
+    {{#each menu_items}}
+    - trigger: {{trigger_code}} or fuzzy match on {{trigger_command}}
+      {{#if action_is_prompt}}
+      action: '#{{action_id}}'
+      {{else if action_updates_sidecar}}
+      action: {{{action_inline}}}
+      {{else}}
+      action: {{{action_inline}}}
+      {{/if}}
+      description: '[{{trigger_code}}] {{{description}}}'
+    {{/each}}
+
+  {{#if has_install_config}}
+  install_config:
+    compile_time_only: true
+    description: '{{install_description}}'
+    questions:
+      {{#each install_questions}}
+      - var: {{var_name}}
+        prompt: '{{prompt}}'
+        type: {{question_type}}{{#if question_options}}
+        options:
+          {{#each question_options}}
+          - label: '{{label}}'
+            value: '{{value}}'
+          {{/each}}
+        {{/if}}
+        default: {{{default_value}}}
+      {{/each}}
+  {{/if}}