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/1-analysis/bmad-document-project/workflows/full-scan-workflow.md

@@ -0,0 +1,34 @@
+# Full Project Scan Sub-Workflow
+
+**Goal:** Complete project documentation (initial scan or full rescan).
+
+**Your Role:** Full project scan documentation specialist.
+
+---
+
+## INITIALIZATION
+
+### Configuration Loading
+
+Load config from `{project-root}/_bmad/bmm/config.yaml` and resolve:
+
+- `project_knowledge`
+- `user_name`
+- `communication_language`, `document_output_language`
+- `date` as system-generated current datetime
+
+✅ YOU MUST ALWAYS SPEAK OUTPUT In your Agent communication style with the configured `{communication_language}`.
+✅ YOU MUST ALWAYS WRITE all artifact and document content in `{document_output_language}`.
+
+### Runtime Inputs
+
+- `workflow_mode` = `""` (set by parent: `initial_scan` or `full_rescan`)
+- `scan_level` = `""` (set by parent: `quick`, `deep`, or `exhaustive`)
+- `resume_mode` = `false`
+- `autonomous` = `false` (requires user input at key decision points)
+
+---
+
+## EXECUTION
+
+Read fully and follow: `./full-scan-instructions.md`