Reorganize code and document functions

bin/main.ml

@@ -0,0 +1,10 @@
+let () =
+  let open Inspector in
+  if Array.length Sys.argv < 2 then (
+    Printf.eprintf "Usage: %s <logfile>\n" (Filename.basename Sys.argv.(0));
+    exit 1);
+
+  let s = State.create Sys.argv.(1) in
+  Printf.printf "Loaded %d lines\n" (State.size s);
+
+  Repl.loop s