Validate and obtain all data needed for install

! @brief public accept interface @param[in] strict whether to expect the last token to be EOF @return whether the input is a proper JSON

@brief return whether pointer points to the root document @sa https://json.nlohmann.me/api/json_pointer/empty/

@brief return whether value is a boolean @sa https://json.nlohmann.me/api/basic_json/is_boolean/

set iterator to a defined past the end

! @param[in] j JSON value to serialize @param[in] use_count whether to use '#' prefixes (optimized format) @param[in] use_type wheth

@brief returns a const iterator to the first element @sa https://json.nlohmann.me/api/basic_json/cbegin/

@brief return whether value is a floating-point number @sa https://json.nlohmann.me/api/basic_json/is_number_float/

set iterator to a defined beginning

! @brief unget current character (read it again on next get) We implement unget by setting variable next_unget to true. The input is not

TODO: Cache this

TODO: do this manually so we don't have to "install" the cnmt's

TODO: Do verification: PFS0 magic, sizes not zero

@brief access specified array element with bounds checking @sa https://json.nlohmann.me/api/basic_json/at/

@brief return flattened JSON value @sa https://json.nlohmann.me/api/basic_json/flatten/

! * @brief convert a byte to a uppercase hex representation * @param[in] byte byte to represent * @return representation ("00".."FF")

return whether the iterator is at end

@brief return whether value is an unsigned integer number @sa https://json.nlohmann.me/api/basic_json/is_number_unsigned/

! @brief determine system byte order @return true if and only if system's byte order is little endian @note from https://stackoverflow.com/a/1001328

! @brief post-increment (it++) @pre The iterator is initialized; i.e. `m_object != nullptr`. */

! @brief post-decrement (it--) @pre The iterator is initialized; i.e. `m_object != nullptr`. */

@brief remove last reference token @sa https://json.nlohmann.me/api/json_pointer/pop_back/

reset token_buffer; current character is beginning of token

@brief returns the number of elements @sa https://json.nlohmann.me/api/basic_json/size/

! @param[in] j JSON value to serialize @pre j.type() == value_t::object */

! @param[in] j JSON value to serialize */

! @param[in] j JSON value to serialize */