BLE List improvements (#1595)

* WIP on add to save list

* Added rewriting existing lines and appending new to same file.

* format

* not looking on new file.

* Added temp list due to some issue of recent being updated during save

I was receiving a system halt and this seems to fix it. Needs more testing though.

* clang format

* Stored entries backward. Fix.

* Update file working, need to replace temp file though.

firmware/application/string_format.hpp

@@ -81,6 +81,8 @@ std::string to_string_mac_address(const uint8_t* macAddress, uint8_t length, boo
 std::string to_string_formatted_mac_address(const char* macAddress);
 void generateRandomMacAddress(char* macAddress);
 
+uint64_t readUntil(File& file, char* result, std::size_t maxBufferSize, char delimiter);
+
 /* Scales 'n' to be a value less than 1000. 'base_unit' is the index of the unit from
  * 'unit_prefix' that 'n' is in initially. 3 is the index of the '1s' unit. */
 std::string unit_auto_scale(double n, const uint32_t base_unit, uint32_t precision);