feat(docker): add dev.sh with auto-funding and ATM app setup

- Add dev.sh script for managing regtest development environment
- Implement cmd_fund to fund ATM app owner via Lightning.Pub API
- Add --fund flag to cmd_up for automatic funding on startup
- Update setup_atm_app to write VITE_APP_ID to machine .env
- Fix Electron IPC to pass appId and extensionApiUrl to renderer
- Restructure repo from nested lamassu-next/ to root

The dev.sh script now supports:
- ./dev.sh up --fund  # Start regtest and auto-fund ATM
- ./dev.sh fund       # Fund existing ATM app
- ./dev.sh status     # Show environment status
- ./dev.sh reset      # Clean restart

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -4,13 +4,11 @@ node_modules/
 
 # Build outputs
 dist/
-build/
-*.tsbuildinfo
-
-# Environment files
-.env
-.env.*
-!.env.example
+.next/
+.nuxt/
+.output/
+target/
+*.node
 
 # IDE
 .idea/
@@ -19,35 +17,51 @@ build/
 *.swo
 *~
 
+# Environment
+.env
+.env.*
+!.env.example
+
+# Secrets
+*.nsec
+*.pem
+*.key
+.secrets.baseline
+
+# Logs
+*.log
+npm-debug.log*
+pnpm-debug.log*
+
+# Testing
+coverage/
+.nyc_output/
+
+# Caches
+.turbo/
+.cache/
+.parcel-cache/
+.eslintcache
+*.tsbuildinfo
+
 # OS
 .DS_Store
 Thumbs.db
 
-# Nix
-result
-result-*
-.direnv/
+# Electron
+apps/machine/dist-electron/
+apps/machine/release/
+
+# devenv
 .devenv/
-.devenv.flake.nix
-
-# Logs
-*.log
-logs/
-
-# Test coverage
-coverage/
-
-# Lamassu specific
-.lamassu/
-*.pem
-*.crt
-*.key
-
-# Claude Code
-.claude/
-
-# Pre-commit (auto-generated by devenv)
+.direnv/
 .pre-commit-config.yaml
 
-# External dependencies (cloned for docker)
-Lightning.Pub/
+# Docker
+docker/**/data/
+
+# Temporary
+tmp/
+temp/
+*.tmp
+*.timestamp-*.mjs