feat: an option to package Ruby runtime and an application separately #838

Job	Run time
build-gem	16s
Use gem to package metanorma ubuntu-20.04 Ruby 3.2.5 CC clang-12	5m 18s
Use gem to package fontist ubuntu-20.04 Ruby 3.2.5 CC clang-12	2m 39s
Use gem to package metanorma alpine:3.17 Ruby 3.2.5 CC gcc	5m 36s
Use gem to package metanorma macos-12 Ruby 3.2.5 CC clang	7m 52s
Use gem to package fontist windows-latest Ruby 3.2.5 CC gcc	36m 0s
Use gem to package fontist alpine:3.17 Ruby 3.2.5 CC gcc	2m 46s
Use gem to package fontist macos-12 Ruby 3.2.5 CC clang	4m 5s
Use gem to package metanorma macos-14 Ruby 3.2.5 CC clang	3m 23s
Use gem to package fontist macos-14 Ruby 3.2.5 CC clang	1m 58s
cross-test on ubuntu-22.04	29s
cross-test on ubuntu-24.04	30s
Release gem	0s
	1h 10m 52s

Provide feedback