Rename project from gastronomy to fuelish

Renamed all image tags, container/volume names, and doc references.

build-image.sh

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-# Builds the gastronomy tools image (tooling-container/Dockerfile) locally, tagged with
+# Builds the fuelish tools image (tooling-container/Dockerfile) locally, tagged with
 # tooling-container/VERSION and :latest. Does not push - test it with the numbered
 # pipeline scripts first, then publish with ./upload-image.sh.
 set -euo pipefail
@@ -12,7 +12,7 @@ fail() { echo "PREFLIGHT FAIL: $*" >&2; exit 1; }
 command -v docker >/dev/null 2>&1 \
     || fail "docker not found in PATH"
 
-IMAGE="${REGISTRY_IMAGE:-gastronomy/tools}"
+IMAGE="${REGISTRY_IMAGE:-fuelish/tools}"
 if [ -f "$ROOT/registry.env" ]; then
     # shellcheck disable=SC1091
     source "$ROOT/registry.env"