fix: Fix entrypoint

.gitignore

@@ -2,4 +2,6 @@
 .claude
 /bin/
 /out/
-gis
+# Root-level build output only — must stay anchored so it does not match the
+# cmd/gis source directory.
+/gis

cmd/gis/main.go

@@ -0,0 +1,11 @@
+// Command gis is the entrypoint for the GIS application.
+//
+// It exposes subcommands for running the HTTP server, the RabbitMQ worker, and
+// database migrations. See `gis --help` for details.
+package main
+
+import "gis/internal/cli"
+
+func main() {
+	cli.Execute()
+}