refactor Pim constant folding pass

share contiguous address resolution in PimCommon
group patterns in subdir for each pass with pattern files

src/PIM/Pass/PimConstantFolding/Patterns.hpp

@@ -0,0 +1,11 @@
+#pragma once
+
+#include "mlir/IR/PatternMatch.h"
+
+namespace onnx_mlir {
+
+void populateConstantFoldingConstantPatterns(mlir::RewritePatternSet& patterns);
+
+void populateConstantFoldingSubviewPatterns(mlir::RewritePatternSet& patterns);
+
+} // namespace onnx_mlir