Add script to setup in-source juce repo

scripts/setup-juce-repos.sh

@@ -0,0 +1,30 @@
+#!/bin/bash
+
+set -e
+
+if [ ! -f meson.build ]; then
+    echo "run from top dir"
+    exit 1
+fi
+
+# legacy/compat repo
+pushd libs/juce-legacy
+
+if [ -d source ]; then
+    mv source source.bak
+fi
+
+git clone git@github.com:DISTRHO/juce.git -b distrho-ports-compat source
+
+popd
+
+# main/juce6 repo
+pushd libs/juce-current
+
+if [ -d source ]; then
+    mv source source.bak
+fi
+
+git clone git@github.com:DISTRHO/juce.git -b main source
+
+popd