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-distillator/bmad-skill-manifest.yaml

@@ -0,0 +1,15 @@
+type: skill
+module: core
+capabilities:
+  - name: bmad-distillator
+    menu-code: DSTL
+    description: "Produces lossless LLM-optimized distillate from source documents. Use after producing large human presentable documents that will be consumed later by LLMs"
+    supports-headless: true
+    input: source documents
+    args: output, validate
+    output: single distillate or folder of distillates next to source input
+    config-vars-used: null
+    phase: anytime
+    before: []
+    after: []
+    is-required: false