feat: implement module loading

I couldn't care less to commit all the changes separately after fight
with this stupid codebase.
Also I am closing the issue since serializing contexts meant doing
something like jars which I don't want to do right now. I'll reopen the
issue though for sure clueless.

Closes: #23

furvm/include/furvm/detail/serialization.hpp

@@ -16,6 +16,14 @@ namespace detail {
  * @return The output stream.
  */
 std::ostream& serialize(std::ostream& os, std::int8_t value);
+
+/**
+ * @brief Serializes an integer.
+ *
+ * @param os Output stream.
+ * @param value Integer.
+ * @return The output stream.
+ */
 std::ostream& serialize(std::ostream& os, std::int16_t value);
 
 /**
@@ -26,6 +34,14 @@ std::ostream& serialize(std::ostream& os, std::int16_t value);
  * @return The output stream.
  */
 std::ostream& serialize(std::ostream& os, std::int32_t value);
+
+/**
+ * @brief Serializes an integer.
+ *
+ * @param os Output stream.
+ * @param value Integer.
+ * @return The output stream.
+ */
 std::ostream& serialize(std::ostream& os, std::int64_t value);
 
 /**
@@ -73,6 +89,87 @@ std::ostream& serialize(std::ostream& os, std::uint64_t value);
  */
 std::ostream& serialize(std::ostream& os, const std::string& value);
 
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::int8_t& value);
+
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::int16_t& value);
+
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::int32_t& value);
+
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::int64_t& value);
+
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::uint8_t& value);
+
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::uint16_t& value);
+
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::uint32_t& value);
+
+/**
+ * @brief Deserializes an integer.
+ *
+ * @param is Input stream.
+ * @param value Integer.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::uint64_t& value);
+
+/**
+ * @brief Deserializes a string.
+ *
+ * @param is Input stream.
+ * @param value String.
+ * @return The input stream.
+ */
+std::istream& load(std::istream& is, std::string& value);
+
 } // namespace detail
 } // namespace furvm