Move docs to luacs-docs/{lua,cs,landing-page}

luacs-docs/cs also has a proper http server for testing locally

luacs-docs/lua/scripts/serve.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
+cd "$DIR/.."
+
+if ! command -v "python3" &> /dev/null; then
+  echo "python3 not found"
+  exit 1
+fi
+
+python3 ../scripts/http_server.py ./build --port 8000