Refine includes for stack.hpp

Also added some docs.
#180

include/nil/blueprint/assigner.hpp

@@ -55,6 +55,7 @@
 #include <nil/blueprint/logger.hpp>
 #include <nil/blueprint/layout_resolver.hpp>
 #include <nil/blueprint/input_reader.hpp>
+#include <nil/blueprint/memory.hpp>
 #include <nil/blueprint/non_native_marshalling.hpp>
 #include <nil/blueprint/stack.hpp>
 #include <nil/blueprint/integers/addition.hpp>

include/nil/blueprint/input_reader.hpp

@@ -31,6 +31,7 @@
 #include "llvm/IR/Type.h"
 
 #include <nil/blueprint/layout_resolver.hpp>
+#include <nil/blueprint/memory.hpp>
 #include <nil/blueprint/signature_parser.hpp>
 #include <nil/blueprint/stack.hpp>
 #include <nil/blueprint/non_native_marshalling.hpp>

include/nil/blueprint/stack.hpp

@@ -26,24 +26,18 @@
 #ifndef CRYPTO3_ASSIGNER_STACK_HPP
 #define CRYPTO3_ASSIGNER_STACK_HPP
 
-#include <list>
-#include <map>
-#include <variant>
-#include <stack>
-
-#include <llvm/IRReader/IRReader.h>
-#include <llvm/IR/LLVMContext.h>
-#include <llvm/Support/SourceMgr.h>
-#include <llvm/IR/Module.h>
-#include <llvm/IR/InstrTypes.h>
-#include <llvm/IR/Instructions.h>
-#include "llvm/IR/Constants.h"
+#include "llvm/IR/Instructions.h"
+#include "llvm/IR/Value.h"
 
-#include <nil/blueprint/memory.hpp>
+#include <map>
+#include <vector>
 
 namespace nil {
     namespace blueprint {
-
+        /**
+         * @brief Execution frame. Each function call uses its own `stack_frame`, which holds
+         * local variables.
+         */
         template<typename VarType>
         struct stack_frame {
             /// @brief Type representing scalar registers.