refactored arena splitting (#450) #300

Job	Run time
clang-format (ZEngine) / clang-format	19s
clang-format (Tetragrama) / clang-format	18s
macOS / cmake-build (Debug, arm64) / cmake-build-macOS-arm64-Debug	8m 46s
macOS / cmake-build (Debug, x64) / cmake-build-macOS-x64-Debug	12m 31s
macOS / cmake-build (Release, x64) / cmake-build-macOS-x64-Release	13m 48s
macOS / cmake-build (Release, arm64) / cmake-build-macOS-arm64-Release	7m 24s
windows / cmake-build (Debug) / cmake-build-windows-Debug	12m 35s
windows / cmake-build (Release) / cmake-build-windows-Release	15m 31s
macOS / test (Debug, arm64) / test-macOS-arm64-Debug	15s
macOS / test (Debug, x64) / test-macOS-x64-Debug	17s
macOS / test (Release, x64) / test-macOS-x64-Release	15s
macOS / test (Release, arm64) / test-macOS-arm64-Release	16s
macOS / deploy (x64) / deploy-macOS-x64-Release	16s
macOS / deploy (arm64) / deploy-macOS-arm64-Release	10s
windows / test (Release) / test-windows-Release	22s
windows / test (Debug) / test-windows-Debug	25s
windows / deploy / deploy-windows-x64-Release	13s
	1h 13m 41s

Provide feedback