add submodule and makefile for building julid

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "julid"]
+	path = julid
+	url = https://gitlab.com/nebkor/julid.git

Makefile

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+.PHONY: run
+run: libjulid.so
+	cargo run --release
+
+.PHONY: init
+init:
+	git submodule init && git submodule update
+
+julid: init
+	cd julid && \
+	cargo build --release --no-default-features -F plugin && \
+	cp target/release/libjulid.so ../
+
+libjulid.so: julid
+
+.PHONY: build
+build: libjulid.so
+	cargo build --release
+
+.PHONY: test
+test: libjulid.so
+	cargo test

julid

@@ -0,0 +1 @@
+Subproject commit 34f85a95a0c289a87de9b97610677ffae136dc68