Switch to typos from cspell - no more npm

scripts/spelling.sh

@@ -1,3 +1,18 @@
 #!/bin/bash
 
-npx cspell --no-progress "**/*.{sh,go,md}"
+set -euo pipefail
+
+GOPATH_TYPOS="$(go env GOPATH)/bin/typos"
+TYPOS_CMD=""
+
+if [ -f "${GOPATH_TYPOS}" ]; then
+  TYPOS_CMD="${GOPATH_TYPOS}"
+elif command -v typos >/dev/null 2>&1; then
+  TYPOS_CMD="typos"
+else
+  echo "Error: typos not found in $(go env GOPATH)/bin or PATH."
+  echo "Please run scripts/devtools.sh or ensure typos is installed correctly."
+  exit 1
+fi
+
+git ls-files '*.go' '*.sh' '*.md' | "${TYPOS_CMD}" --file-list -