fix: add missing Macros.hpp include to Error.hpp (#755)

* Add missing Macros.hpp include to Error.hpp

To address:

```
In file included from /ITKWebAssemblyInterface/include/itkPipeline.h:21:
In file included from /ITKWebAssemblyInterface-build/_deps/cli11-src/include/CLI/App.hpp:25:
In file included from /ITKWebAssemblyInterface-build/_deps/cli11-src/include/CLI/ConfigFwd.hpp:17:
/ITKWebAssemblyInterface-build/_deps/cli11-src/include/CLI/Error.hpp:75:5: error: unknown type name 'CLI11_NODISCARD'
    CLI11_NODISCARD int get_exit_code() const { return actual_exit_code; }
    ^
```

* style: pre-commit.ci fixes

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

include/CLI/Error.hpp

@@ -15,6 +15,7 @@
 // [CLI11:public_includes:end]
 
 // CLI library includes
+#include "Macros.hpp"
 #include "StringTools.hpp"
 
 namespace CLI {