shader: Add pools and rename files

src/shader_recompiler/frontend/ir/program.h

@@ -0,0 +1,21 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <string>
+
+#include <boost/container/small_vector.hpp>
+
+#include "shader_recompiler/frontend/ir/function.h"
+
+namespace Shader::IR {
+
+struct Program {
+    boost::container::small_vector<Function, 1> functions;
+};
+
+[[nodiscard]] std::string DumpProgram(const Program& program);
+
+} // namespace Shader::IR