chore: tighten npm package contents and ignore .claude/ (#5)

Pre-publish hygiene so the tarball ships only what users need:

- Add `files: ["index.js"]` whitelist. The published tarball now
  contains only index.js + README + LICENSE + package.json (4 files,
  ~7kB) instead of the previous 9 files including ASCII-art tuning
  scripts (count-ascii.js, count-banner.js, jspod-ascii.js,
  verify-spacing.js) and local agent state (.claude/settings.local.json).
- `npm pkg fix` cleaned the bin entry: "./index.js" -> "index.js"
  (npm was auto-correcting this on every publish).
- Add .claude/ to .gitignore so local agent/IDE state never leaks
  into the repo or future tarballs.

`npm publish --dry-run` is clean (no warnings, no stray files).

Author: melvincarvalho

.gitignore

@@ -4,3 +4,4 @@ pod-data/
 .env
 .DS_Store
 package-lock.json
+.claude/

package.json

@@ -5,8 +5,11 @@
   "type": "module",
   "main": "index.js",
   "bin": {
-    "jspod": "./index.js"
+    "jspod": "index.js"
   },
+  "files": [
+    "index.js"
+  ],
   "scripts": {
     "start": "node index.js"
   },