switch to xmake for package management (#611)

This change removes our dependency on vcpkg for package management, in favour of bringing some code in-tree in the `thirdparty` folder as well as using the xmake build-in package management feature. For the latter, all the package definitions are maintained in the zen repo itself, in the `repo` folder.

It should now also be easier to build the project as it will no longer depend on having the right version of vcpkg installed, which has been a common problem for new people coming in to the codebase. Now you should only need xmake to build.

* Bumps xmake requirement on github runners to 2.9.9 to resolve an issue where xmake on Windows invokes cmake with `v144` toolchain which does not exist
* BLAKE3 is now in-tree at `thirdparty/blake3`
* cpr is now in-tree at `thirdparty/cpr`
* cxxopts is now in-tree at `thirdparty/cxxopts`
* fmt is now in-tree at `thirdparty/fmt`
* robin-map is now in-tree at `thirdparty/robin-map`
* ryml is now in-tree at `thirdparty/ryml`
* sol2 is now in-tree at `thirdparty/sol2`
* spdlog is now in-tree at `thirdparty/spdlog`
* utfcpp is now in-tree at `thirdparty/utfcpp`
* xmake package repo definitions is in `repo`
* implemented support for sanitizers. ASAN is supported on windows, TSAN, UBSAN, MSAN etc are supported on Linux/MacOS though I have not yet tested it extensively on MacOS
* the zencore encryption implementation also now supports using mbedTLS which is used on MacOS, though for now we still use openssl on Linux
* crashpad
* bumps libcurl to 8.11.0 (from 8.8.0) which should address a rare build upload bug

1 files changed, 23 insertions, 0 deletions

diff --git a/thirdparty/ryml/ext/c4core/ROADMAP.md b/thirdparty/ryml/ext/c4core/ROADMAP.md
new file mode 100644
index 000000000..9857514e4
--- /dev/null
+++ b/thirdparty/ryml/ext/c4core/ROADMAP.md
@@ -0,0 +1,23 @@
+# ROADMAP
+
+## New features
+
+These changes will provide new features, and client code can be kept
+unchanged.
+
+
+## API changes
+
+These changes will require client code to be updated.
+
+* [breaking] drop use of C-style sprintf() formats in error messages and
+  assertions. Change the implementation to use c4::format()
+  ```c++
+  C4_ASSERT_MSG(sz > s.size(), "sz=%zu s.size()=%zu", sz, s.size());
+  // ... the above changes to:
+  C4_ASSERT_MSG(sz > s.size(), "sz={} s.size()={}", sz, s.size());
+  ```
+
+## Implementation changes
+
+* drop calls to sprintf() in charconv.hpp.