Adopt lerna and typescript

Makefile

@@ -0,0 +1,41 @@
+all: dev dev-mt
+
+PROD_CFLAGS := -O3 -msimd128
+
+clean:
+	rm -rf ./packages/core$(PKG_SUFFIX)/dist
+	rm -rf ./packages/core$(PKG_SUFFIX)/types
+
+.PHONY: build
+build:
+	make clean PKG_SUFFIX="$(PKG_SUFFIX)"
+	EXTRA_CFLAGS="$(EXTRA_CFLAGS)" \
+	EXTRA_LDLAGS="$(EXTRA_LDLAGS)" \
+	FFMPEG_MT="$(FFMPEG_MT)" \
+		docker buildx build \
+			--build-arg EXTRA_CFLAGS \
+			--build-arg EXTRA_LDLAGS \
+			--build-arg FFMPEG_MT \
+			-o ./packages/core$(PKG_SUFFIX) \
+			$(EXTRA_ARGS) \
+			.
+	cp -r src/types/core packages/core$(PKG_SUFFIX)/types
+
+build-mt:
+	make build \
+		PKG_SUFFIX=-mt \
+		FFMPEG_MT=yes \
+		EXTRA_CFLAGS="-sUSE_PTHREADS -pthread" \
+		EXTRA_LDLAGS="-sPTHREAD_POOL_SIZE=8"
+
+dev:
+	make build
+
+dev-mt:
+	make build-mt
+
+prd:
+	make build EXTRA_CFLAGS="$(PROD_CFLAGS)"
+
+prd-mt:
+	make build-mt EXTRA_CFLAGS="$(PROD_CFLAGS)"