[BREAKING] Rename UIs (#254)

Rename the UIs in docker compose to their new names

Changes folder names

Changes output folder structure

Closes issue #263

Adds `sygil-sl` instead of docker compose flag.

.devscripts/migratev3tov4.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -Eeuo pipefail
+
+echo "Moving everything in output to output/old..."
+mv output old
+mkdir output
+mv old/.gitignore output
+mv old output