chore(core): make kmx_test_source available as a library

Linux builds require kmx_test_source.cpp in order to run tests. So make
this available even when other tests are disabled.

chore: move from vcvarsall.bat to vsdevcmd.bat

chore(core): cleanup meson build

chore: merge master to feature-ldml A17S7 again

chore(common): stats script for planning

feat(developer): touch layout compiler for LDML 🙀

chore: merge master into feature-ldml A17S7 🙀

chore: use builtin instead of dirname for perf

chore: remove greadlink from standard script prolog

chore(docs): update docs due to Mac Ventura

feat(core): ldml rename key2 to keys 🙀

auto: increment master version to 17.0.55

fix(android/app): Fix OSK width when rotating

fix(linux): Fix paths in upload action of packaging GHA

fix(ios): allow duplicate languages in kmp file