feat: implement version bumping script and pre-push hook

scripts/install-hooks.js

@@ -0,0 +1,33 @@
+#!/usr/bin/env node
+// Installs scripts/pre-push as .git/hooks/pre-push.
+// Runs automatically via the `prepare` npm lifecycle hook (npm install).
+
+const fs = require("fs");
+const path = require("path");
+
+const repoRoot = path.resolve(__dirname, "..");
+const hooksDir = path.join(repoRoot, ".git", "hooks");
+const source = path.join(repoRoot, "scripts", "pre-push");
+const target = path.join(hooksDir, "pre-push");
+
+if (!fs.existsSync(path.join(repoRoot, ".git"))) {
+  // Not a git repo (e.g. Docker / CI build from tarball) — skip silently.
+  process.exit(0);
+}
+
+if (!fs.existsSync(hooksDir)) {
+  fs.mkdirSync(hooksDir, {recursive: true});
+}
+
+try {
+  // Symlink so changes to scripts/pre-push are reflected immediately.
+  if (fs.existsSync(target) || fs.lstatSync(target).isSymbolicLink()) {
+    fs.unlinkSync(target);
+  }
+} catch {
+  // Target doesn't exist yet — that's fine.
+}
+
+fs.symlinkSync(source, target);
+fs.chmodSync(source, 0o755);
+console.log("[prepare] Installed git pre-push hook → .git/hooks/pre-push");