Update setup docs and scripts

Refresh setup docs, add ZXDB local setup script, and note deploy rules.

Signed-off-by: codex@lucy.xalior.com

bin/deploy.sh

@@ -8,6 +8,10 @@ if ! git diff --quiet || ! git diff --cached --quiet; then
   echo "Working tree is not clean. Commit or stash changes before deploy."
   exit 1
 fi
+if git ls-files --others --exclude-standard | grep -q .; then
+  echo "Untracked files present. Commit or remove them before deploy."
+  exit 1
+fi
 
 cleanup() {
   git checkout "${current_branch}" >/dev/null 2>&1 || true