Meta: Separate ccache setup into its own component

Author: https://github.com/Jan200101
Commit: 10d40af167
Pull-request: https://github.com/SerenityOS/serenity/pull/16346
Reviewed-by: https://github.com/ADKaster ✅
Reviewed-by: https://github.com/timschumi

Meta/CMake/setup_ccache.cmake

@@ -0,0 +1,9 @@
+#
+# ccache setup
+#
+
+find_program(CCACHE_PROGRAM ccache)
+if(CCACHE_PROGRAM)
+    set(CMAKE_C_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" CACHE FILEPATH "Path to a compiler launcher program, e.g. ccache")
+    set(CMAKE_CXX_COMPILER_LAUNCHER "${CCACHE_PROGRAM}" CACHE FILEPATH "Path to a compiler launcher program, e.g. ccache")
+endif()