Added support for schemata

tests/test_schema.cpp

@@ -0,0 +1,22 @@
+#include <gtest/gtest.h>
+
+#include <sqlgen.hpp>
+#include <sqlgen/parsing/to_create_table.hpp>
+
+namespace test_schema {
+
+struct TestTable {
+  using schema = sqlgen::Literal<"test">;
+
+  std::string field1;
+  int32_t field2;
+  sqlgen::PrimaryKey<uint32_t> id;
+  std::optional<std::string> nullable;
+};
+
+TEST(general, test_schema) {
+  const auto create_table_stmt = sqlgen::parsing::to_create_table<TestTable>();
+
+  EXPECT_EQ(create_table_stmt.table.schema, "test");
+}
+}  // namespace test_schema