The function currently has 2 purposes: (1) To copy dependent dlls for
executables to output binary directory. This ensures that these helper
processes can be ran after a build given not all DLLs from vcpkg libs
get implicitly copied to the bin folder. (2) Allow fully background
and/or GUI processes to use the Windows Subsystem. This prevents
unnecessarily launching a console for the process, as we either require
no user interaction or the user interaction is all handled in the GUI.
The BUILD_RPATH/INSTALL_RPATH CMake infrastructure is not supported
on Windows, but we want to ensure Ladybird executables are runnable
after the build phase so there can be an efficient dev loop.
lagom_copy_runtime_dlls() can be used by executable targets so all
their dependent dlls are copied to their output directory in their
post build step.
We occasionally (frequently) time out in CI. If ctest triggers this
timeout, it sends a SIGSTOP followed by a SIGKILL. Since we want to
gracefully exit the test runner, ask ctest to send a SIGTERM instead.
This should cause active test status reports to show up in CI.
Now that headless mode is built into the main Ladybird executable, the
headless-browser's only purpose is to run tests. So let's move it to the
testing directory and rename it to test-web (a la test-js / test-wasm).
