v0.5.1: ship extraction wrapper in npm package

Patch release: adds scripts/ to npm files (extraction wrapper + prompt),
fixes port default 3177→7749, adds extraction tutorial section (EN+ZH),
corrects 8 doc inaccuracies from full audit.

Author: tznthou

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@tznthou/ccrecall",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "description": "AI memory service for Claude Code — on-demand context injection with metacognition",
   "type": "module",
   "main": "dist/index.js",