build: add justfile for using just command

Justfile

@@ -0,0 +1,42 @@
+root := justfile_directory()
+
+export TYPST_ROOT := root
+
+[private]
+default:
+	@just --list --unsorted
+
+# generate manual
+doc:
+	typst compile docs/manual.typ docs/manual.pdf
+
+# run test suite
+test *args:
+	typst-test run {{ args }}
+
+# update test cases
+update *args:
+	typst-test update {{ args }}
+
+# package the library into the specified destination folder
+package target:
+  ./scripts/package "{{target}}"
+
+# install the library with the "@local" prefix
+install: (package "@local")
+
+# install the library with the "@preview" prefix (for pre-release testing)
+install-preview: (package "@preview")
+
+[private]
+remove target:
+  ./scripts/uninstall "{{target}}"
+
+# uninstalls the library from the "@local" prefix
+uninstall: (remove "@local")
+
+# uninstalls the library from the "@preview" prefix (for pre-release testing)
+uninstall-preview: (remove "@preview")
+
+# run ci suite
+ci: test doc