Move Coverity job to GHA

add range methods to basic_string

string_view: add relational operators for string_view class

- add -Ob3 flag to avoid C1064 error in Windows environment

- extend tests to test also wchar_t type

- port libcxx tests to use pmem::obj::string_view class

- taken from: llvm-mirror/libcxx@78d6a77

- add missing relational operators for string_view

examples: update min cmake version to 3.4

fix default bytes_view in radix_tree

radix_tree improvements

use try_emplace instead of emplace

Merge changes from stable 1.11 to master

in examples using 'include' command - it also uses 'CheckIncludeFile'
which (in CMake <=3.3) worked only with set project language (CXX in this case),
and some included files are supposed to be checked with C lang, too.

With help of: https://github.com/nlohmann/cmake_min_version

CI: fix GHA docs' job - use branches names not tags

update Fedora image for doc job

Radix tree assing val fix

Fix value() function which was creating an empty string (wrong input parameter)
and add testcases for basic_inline_string<uint8_t> and basic_inline_string<wchar_t>
as value types.

Realocating path should be taken for values which are instances
of basic_inline_string<CharT, Traits> (not only for CharT = char).

add new release step to update version in vcpkg

readme: add info about minimal VS version for radix

coloring in IDE was not applied, because of this additional new line

docker: bump images' tag to 1.12

add stable-1.11 to valid branches