feat: prepend socket interface to nix build output

scripts/colorshell-socket-interface.sh

@@ -0,0 +1,13 @@
+#!/usr/bin/env bash
+
+if gdbus introspect --session \
+  --dest io.github.retrozinndev.colorshell \
+  --object-path /io/github/retrozinndev/colorshell > /dev/null 2>&1; then
+
+    if command -v socat > /dev/null 2>&1; then
+        echo "$@" | socat - "${XDG_RUNTIME_DIR:-/run/user/$(id -u)}/colorshell.sock"
+        exit 0
+    else
+        echo "[warn] \`socat\` not installed, falling back to remote instance communication"
+    fi
+fi