Add `set -e` in build.sh to stop build process on error

Add SYSTEM flag to add_subdirectory(".../googletest") in CMakeLists.txt
to supress warnings from the inside of googletest

Replace INSTANTIATE_TEST_CASE_P, which is deprecated, with
INSTANTIATE_TEST_SUITE_P in NDVerifier tests

Mark unused fields as [[maybe_unused]], because clang produces warning
that becomes an error in Debug mode. Use MAYBE_UNUSED macro, because
g   produces warning when [[maybe_unused]] macro is present, and clang --
when it isn't.

Convert double literals to model::DoubleType and model::IntType explicitly, because
otherwise clang produces a warning, that becomes an error in debug mode

Add run_tests_clang action in core_tests.yml
Also, work around clang-18 bug

- Check that column is numeric *before* casting it to INumericType
in DataStats::GetMedianAD
- Don't process empty vector in GetPartition in gfd_validation.cpp
- Disable tests causing float-to-long cast when result is infinity

Add Clang installation guide to README.md

Use simple RAII wrapper of std::thread instead of std::jthread
when the latter isn't implemented (which is the case in Apple Clang)

Use custom implementations of std::bitset::_Find_dirst and
_Find_next when gcc intrinsics aren't availible
Use some tricks with boost::dynamic_bitset in fd_tree_bitset
to avoid GCC intrinsics _Find_first and _Find_next

Use std::chrono::high_resolution_clock instead of
std::chrono::_V2::high_resolution_clock in fastod/util/timer.h,
because symbol versioning is gcc-specific

Make GetByte function contexpr only if std::vector::operator[]
is contexpr (which isn't on old versions of GCC)

Shift bitset 1 bit left in CreateDynamicBitset (fallback variant),
as it done in main (gcc intrinsic) variant. Also, rename this function
for clarity.

Use system_clock everywhere instead of mix of system_clock and
high_resolution_clock in Cords::ExecuteInternal

Add instructions how to build boost with clang

Link clang build with libc   instead of libstc   in CI
Also build boost with clang in CI

Don't violate implicit noexcept(true) in AutoJoinThread's destructor

Version 1.13.0 of googletest produces "narrowing conversion" warning due to a bug
(issue #4206, google/googletest#4206) when building
with Clang. This bug was fixed in 1.14.0 (commit 3044657,
google/googletest@3044657)

Install all LLVM packages in install-clang action in CI,
not only LLVM and Clang

Use concepts to test GCC intrinsics precence, instead of SFINAE

Use stable_sort instead of sort to avoid relying on
unspecified behaviour (wheter sort preserves order of equal elements)

Sort pairs by value if frequencies are equal in Cords'
FrequencyHandler::InitFrequencyHandler

Use reverse iterators to traverse set in reverse order, instead of
messing with normal iterators

Disable alloc-dealloc-mismatch check as it's false positive
on Ubuntu (see comment in CMakeLists.txt)

Limit UB sanitizer "function" check to only our code when building with
Clang on macOS

Shift bitset 1 bit left in CreateDynamicBitset (fallback variant),
as it done in main (gcc intrinsic) variant. Also, rename this function
for clarity.

This reverts commit 30c4d53.

Build boost insteads on installing it with brew

There's no brach "release-1.14.0" in googletest repo

Install boost into /usr/local on macOS in CI, as /usr/{lib,include,bin,etc.} are read-only

- Add fallback behaviour in hymd::utility::MdLessPairs if
  operator <=> for vectors isn't availible
- Add explicit #include <string> in exceptions.h

Add brew Clang building isntructions to README