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>

.claude/skills/bmad-testarch-framework/workflow.yaml

@@ -0,0 +1,48 @@
+# Test Architect workflow: bmad-testarch-framework
+name: bmad-testarch-framework
+# prettier-ignore
+description: 'Initialize test framework with Playwright or Cypress. Use when the user says "lets setup test framework" or "I want to initialize testing framework"'
+
+# Critical variables from config
+config_source: "{project-root}/_bmad/tea/config.yaml"
+output_folder: "{config_source}:output_folder"
+test_artifacts: "{config_source}:test_artifacts"
+user_name: "{config_source}:user_name"
+communication_language: "{config_source}:communication_language"
+document_output_language: "{config_source}:document_output_language"
+date: system-generated
+
+# Workflow components
+installed_path: "."
+instructions: "./instructions.md"
+validation: "./checklist.md"
+
+# Variables and inputs
+variables:
+  test_dir: "{project-root}/tests" # Root test directory
+  use_typescript: true # Prefer TypeScript configuration
+  framework_preference: "auto" # auto, playwright, cypress - user can override auto-detection
+  project_size: "auto" # auto, small, large - influences framework recommendation
+
+# Output configuration
+default_output_file: "{test_dir}/README.md" # Main deliverable is test setup README
+
+# Required tools
+required_tools:
+  - read_file # Read package.json, existing configs
+  - write_file # Create config files, helpers, fixtures, tests
+  - create_directory # Create test directory structure
+  - list_files # Check for existing framework
+  - search_repo # Find architecture docs
+
+tags:
+  - qa
+  - setup
+  - test-architect
+  - framework
+  - initialization
+
+execution_hints:
+  interactive: false # Minimize prompts; auto-detect when possible
+  autonomous: true # Proceed without user input unless blocked
+  iterative: true