Initial commit: smartrun MVP

Garmin run classification and progression tracker. Go backend (MCP
client to mcp-garmin, SQLite store, deterministic rule engine, REST
API) and React/TS frontend (Dashboard, Review Queue, Workout Kinds).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,21 @@
+# Go
+backend/smartrund
+backend/*.db
+backend/*.db-journal
+
+# Node
+frontend/node_modules/
+frontend/dist/
+
+# IDE
+.idea/workspace.xml
+.idea/shelf/
+
+# Env / secrets
+.env
+*.env.local
+
+# OS
+.DS_Store
+backend/mcpspike
+backend/cmd/mcpspike/mcpspike