Add project files

breeze/cmake/CopyRuntimeDlls.cmake

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+# =============================================================================
+# CopyRuntimeDlls.cmake
+#
+# Usage (from a POST_BUILD add_custom_command; see BuildHelpers.cmake's
+# _copy_target_runtime_dlls()):
+#   cmake -DDEST=<dir> "-DFILES=$<TARGET_RUNTIME_DLLS:tgt>" -P CopyRuntimeDlls.cmake
+#
+# Exists only because `cmake -E copy_if_different <dest>` -- the obvious,
+# one-line way to do this -- errors out (and fails the whole build) when
+# given zero source files, which $<TARGET_RUNTIME_DLLS:tgt> legitimately
+# evaluates to for most targets (anything that links no SHARED library,
+# which is most executables in most projects, this one's included: only
+# a target that depends on a SHARED module -- like core_lib -- has any
+# files here at all). Confirmed directly: without this indirection, that
+# empty case stops the build with cmake -E's own usage text as the error.
+# A plain `if(FILES)` here is all it takes to make "nothing to do" a
+# success instead of a build failure.
+# =============================================================================
+if(FILES)
+    file(COPY ${FILES} DESTINATION "${DEST}")
+endif()