📦 chore: make the published package actually complete

`files` was ["dist"], but dist carries 256KB of .js.map and .d.ts.map
whose `sources` point at ../../src/*.ts — which was not published. Every
shipped sourcemap resolved to nothing: 44% of the tarball, dead weight.

The source is 116KB and its comments are the most detailed explanation of
why the engine does what it does, so it now ships (tests and the demo
excluded) and the maps resolve. Verified from a real `npm pack` install:
both utils.js.map and utils.d.ts.map now resolve to a file that exists, so
stepping into cereale in a debugger and "go to definition" from a decorator
both land in the real TypeScript.

Also: CHANGELOG.md ships; the repository/homepage/bugs URLs said
Avalon-Vanguard and only worked via GitHub's redirect, now lowercase to
match the org; publishConfig.access is explicit so a later move to a scoped
name cannot quietly attempt a private publish.

Adds a Publish to npm workflow, deliberately manual — pushing a tag does
not publish, because a tag is a decision to cut a release and publishing is
a decision to make it public and immutable. It asserts the tag exists and
points at the commit being published, refuses a version already on the
registry, runs the full verify gate, prints the file list, and defaults to
a dry run.

Checked end to end against the tarball: a strict consumer (no skipLibCheck,
no DOM lib) compiles and runs against both `cereale` and `cereale/vite`.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SAcqrz3FcadkYr3xG32CjK

package.json

@@ -23,7 +23,11 @@
     "./dist/cjs/metadata.js"
   ],
   "files": [
-    "dist"
+    "dist",
+    "src",
+    "CHANGELOG.md",
+    "!src/**/*.test.ts",
+    "!src/example.ts"
   ],
   "scripts": {
     "build": "rm -rf dist && tsc -p tsconfig.cjs.json && tsc -p tsconfig.esm.json && echo '{\"type\": \"commonjs\"}' > dist/cjs/package.json",
@@ -45,7 +49,7 @@
   },
   "repository": {
     "type": "git",
-    "url": "git+https://github.com/Avalon-Vanguard/cereale.git"
+    "url": "git+https://github.com/avalon-vanguard/cereale.git"
   },
   "keywords": [
     "json",
@@ -62,9 +66,9 @@
   "author": "Avalon Vanguard",
   "license": "MIT",
   "bugs": {
-    "url": "https://github.com/Avalon-Vanguard/cereale/issues"
+    "url": "https://github.com/avalon-vanguard/cereale/issues"
   },
-  "homepage": "https://github.com/Avalon-Vanguard/cereale#readme",
+  "homepage": "https://github.com/avalon-vanguard/cereale#readme",
   "devDependencies": {
     "@babel/standalone": "^8.0.4",
     "@eslint/js": "^10.0.1",
@@ -78,5 +82,8 @@
     "typescript": "^6.0.2",
     "typescript-eslint": "^8.58.2",
     "vitest": "^4.1.4"
+  },
+  "publishConfig": {
+    "access": "public"
   }
 }