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/qa-generate-e2e-tests/workflow.yaml

@@ -0,0 +1,42 @@
+name: qa-generate-e2e-tests
+description: 'Generate end to end automated tests for existing features. Use when the user says "create qa automated tests for [feature]"'
+
+# Critical variables from config
+config_source: "{project-root}/_bmad/bmm/config.yaml"
+implementation_artifacts: "{config_source}:implementation_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: "{project-root}/_bmad/bmm/workflows/qa-generate-e2e-tests"
+instructions: "{installed_path}/instructions.md"
+validation: "{installed_path}/checklist.md"
+template: false
+
+# Variables and inputs
+test_dir: "{project-root}/tests" # Root test directory
+source_dir: "{project-root}" # Source code directory
+
+# Output configuration
+default_output_file: "{implementation_artifacts}/tests/test-summary.md"
+
+# Required tools
+required_tools:
+  - read_file # Read source code and existing tests
+  - write_file # Create test files
+  - create_directory # Create test directories
+  - list_files # Discover features
+  - search_repo # Find patterns
+  - glob # Find files
+
+tags:
+  - qa
+  - automation
+  - testing
+
+execution_hints:
+  interactive: false
+  autonomous: true
+  iterative: false