feat: initial KosmoConnect platform v0.1

Includes:
- Backend services: ingestion (:8001), weather API (:8002),
  gateway (:8003), billing (:8004) with BTCPay integration
- Shared asyncpg pool, TimescaleDB hypertable, Redis, Mosquitto MQTT
- React frontend: Dashboard (MapLibre) and Messaging (chat UI)
- Bridge daemon for Pi + Meshtastic (Serial/TCP T-Deck support)
- Production Docker Compose, Nginx reverse proxy, ops scripts
- DEPLOY.md with step-by-step deployment guide

.gitignore

@@ -0,0 +1,55 @@
+# General
+.DS_Store
+*.log
+*.tmp
+*.swp
+*.swo
+.vscode/
+.idea/
+
+# Firmware
+firmware/**/.pio/
+firmware/**/build/
+firmware/**/.vscode/
+*.elf
+*.bin
+*.hex
+
+# Backend
+backend/**/__pycache__/
+backend/**/.venv/
+backend/**/venv/
+backend/**/.env
+backend/**/*.pyc
+backend/**/.pytest_cache/
+backend/**/.mypy_cache/
+
+# Web
+web/**/node_modules/
+web/**/dist/
+web/**/.env.local
+web/**/.env.*.local
+
+# Ops
+ops/terraform/.terraform/
+ops/terraform/*.tfstate
+ops/terraform/*.tfstate.*
+ops/terraform/*.tfvars
+ops/ansible/*.retry
+
+# Hardware
+hardware/**/*.lck
+hardware/**/gerbers/
+hardware/**/production/
+hardware/**/*.step
+hardware/**/*.stp
+
+# Kits
+kits/**/*.pdf
+!kits/**/manual/*.pdf
+
+# Secrets
+secrets/
+*.pem
+*.key
+.env