chore: bootstrap repo with AGENTS.md and .gitignore

.gitignore

@@ -0,0 +1,57 @@
+# ===== OS =====
+.DS_Store
+Thumbs.db
+desktop.ini
+$RECYCLE.BIN/
+
+# ===== IDE =====
+.vscode/
+.idea/
+*.swp
+*.swo
+*.iml
+.cursor/
+
+# ===== Logs =====
+*.log
+logs/
+
+# ===== Env / Secrets =====
+.env
+.env.local
+.env.*.local
+*.pem
+*.key
+secrets/
+
+# ===== Backend (Go) =====
+fuellog-api/bin/
+fuellog-api/dist/
+fuellog-api/coverage.out
+fuellog-api/*.test
+fuellog-api/*.out
+fuellog-api/.air.toml.local
+
+# ===== Database (SQLite) =====
+# Keep the data/ directory, but ignore runtime DB files
+data/*.db
+data/*.db-journal
+data/*.db-shm
+data/*.db-wal
+
+# ===== Frontend (Node / Vue) =====
+fuellog-web/node_modules/
+fuellog-web/dist/
+fuellog-web/dist-ssr/
+fuellog-web/.vite/
+fuellog-web/*.local
+fuellog-web/.nuxt/
+fuellog-web/.next/
+fuellog-web/.cache/
+
+# ===== Coverage =====
+coverage/
+.nyc_output/
+
+# ===== Docker =====
+*.pid