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>

docker/strfry.conf

@@ -0,0 +1,65 @@
+##
+## strfry configuration for Lamassu ATM development
+##
+
+relay {
+    bind = "0.0.0.0"
+    port = 7777
+
+    # Set to 0 to skip configuring nofiles limit (avoids container ulimit issues)
+    nofiles = 0
+
+    info {
+        name = "Lamassu Dev Relay"
+        description = "Private Nostr relay for ATM development and testing"
+        pubkey = ""
+        contact = ""
+    }
+
+    # Maximum message size in bytes
+    maxWebsocketPayloadSize = 131072
+
+    # Connection limits
+    maxWebsockets = 100
+    maxConnections = 1000
+}
+
+# Event policies
+events {
+    # Maximum event size
+    maxEventSize = 65536
+
+    # Rate limiting
+    rejectEventsNewerThanSeconds = 900
+    rejectEventsOlderThanSeconds = 94608000
+
+    # Event kinds we care about
+    # 14: Private DMs (NIP-17)
+    # 21000: Lightning.Pub RPC (generic request/response)
+    # 21001-21003: CLINK events (Offer, Debit, Manage)
+    # 22242: NIP-42 auth
+    # 30078: Service Beacon (replaceable, service discovery)
+    # 30079: Transaction records (replaceable)
+
+    # TODO: Review if these ephemeral event settings actually do anything useful.
+    # CLINK events (21000-21003) are in the ephemeral range but need to persist
+    # long enough for request/response flows. These settings may not be recognized
+    # by strfry - verify against strfry documentation.
+    # Allow ephemeral events up to 5 minutes old to be accepted
+    rejectEphemeralEventsOlderThanSeconds = 300
+    # Keep ephemeral events for 5 minutes before deletion
+    ephemeralEventsLifetimeSeconds = 300
+}
+
+# Negentropy sync (for relay federation)
+negentropy {
+    enabled = true
+    syncOnConnect = false
+}
+
+# Plugins (for NIP-42 auth in production)
+# plugins {
+#     authRequired = true
+#     writePolicy = "accept"
+#     readPolicy = "accept"
+# }