feat: initial commit — BMAD tooling, Claude memories, firmware scaffold

Adds the complete project foundation:
- BMAD BMM workflow tooling (_bmad/)
- Claude slash commands, skills, and project memories (.claude/)
- ESP32 firmware scaffold (PlatformIO + Waveshare e-ink driver)
- .gitignore excluding _bmad-output/ and .pio/ build artifacts

Planning artifacts (PRD, architecture, epics) are intentionally not
tracked — they live in _bmad-output/ per project convention.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

_bmad/bmm/workflows/1-analysis/research/research.template.md

@@ -0,0 +1,29 @@
+---
+stepsCompleted: []
+inputDocuments: []
+workflowType: 'research'
+lastStep: 1
+research_type: '{{research_type}}'
+research_topic: '{{research_topic}}'
+research_goals: '{{research_goals}}'
+user_name: '{{user_name}}'
+date: '{{date}}'
+web_research_enabled: true
+source_verification: true
+---
+
+# Research Report: {{research_type}}
+
+**Date:** {{date}}
+**Author:** {{user_name}}
+**Research Type:** {{research_type}}
+
+---
+
+## Research Overview
+
+[Research overview and methodology will be appended here]
+
+---
+
+<!-- Content will be appended sequentially through research workflow steps -->