feat: Adds justfile with script to create new note and list last note.

justfile

@@ -0,0 +1,16 @@
+
+[private]
+default:
+	@just --list
+
+# Create a new note.
+new *name:
+	@fname=$(echo {{name}}  | tr " " "_") && \
+		doc="$(isosec).$fname.md" && \
+		echo "# {{name}}" > "$doc" && \
+		echo "$doc"
+
+# Get the last note created.
+last:
+	@/bin/ls -t *.md | head -1
+