YDB C++ SDK in a separate repo

[Gazizonoki]

• Replace ya make to CMake #55
• Remove conan from project #21
• Fix CMake build on Mac OS #11
• Contrib dependencies replace to cmake find_library #6
• Replace TString to std::string #3
• Replace TStringBuf to std::string_view #20
• Replace TList to std::list #4
• Replace TVector to std::vector #5
• Replace TMap/TMultiMap to std::map/std::multimap #2
• Generate protobuf from system protoc #16
• Replace deprecated sprintf in util on Mac OS #19
• Replace util types to stdlib in generate_enum_serialization command (tools/enum_parser) #26
• Add CI for build YDB SDK #28
• Connect .proto files via ydb-api-proto submodule #29
• Remove PQv1 interface #30
• Replace custom allocators to system #32
• Replace util time types: TInstant, TDuration #34
• Replace THashMap to std::unordered_map #37
• Replace TMaybe to std::optional #41
• Replace IInputStream/IOuputStream/TStringStream/... to std::istream/std::ostream/std::stringstream/... #56
• Replace TSet to std::set #57
• Replace TDeque to std::deque #58
• Replace THashSet to std::unordered_set #59
• Refactor library/cpp/blockcodecs (remove not usable codecs) #60
• Replace TAtomic to std::atomic #62
• Replace TMutex to std::mutex #63
• Replace TCondVar to std::condition_variable #64
• Replace THolder to std::unique_ptr #65
• Replace TAutoPtr to std::unique_ptr #73
• Replace TSharedPtr to std::shared_ptr #72
• Fix ccache in CI (problems with cache directory) #71
• Replace TArrayRef to std::span #79
• Replace TQueue to std::queue #80
• Add cmake install #112
• Replace Sprintf, Printf to std::format #114
• Replace Cout, Cerr, Clog, Cnull, Cdbg to standard stream or use std::ostream implementation #126
• Fix SDK tests #129
• Replace TFsPath to std::filesystem::path #136
• Replace TDirIterator to std::filesystem::recursive_directory_iterator #137
• Replace TTempDir to std::filesystem::temp_directory_path #138
• Replace non-member functions in util/folder/dirut.h to std::filesystem functions #139
• Remove TLegacyFuture #152
• Replace util/random to STL random #212
• Remove Snappy codec from repo #249
• Move vector_index example from ydb repo #258