* Implement << operator for std basic_ostream and etl string_view
* Implement << operator for std basic_ostream and etl ibasic_string. Still working through tests
* Should be all tests
* Fix comment
Updated CI scripts
#786 u8string
#783 Cannot insert existing value to full set
#781 etl::multi_span::iterator::operator *() fails if first span is empty
#780 endian enum_type produces useless-cast warnings
#779 hash.h: warnings produced with -Wfloat-equal
