Bump @babel/parser to 8.0.4 and raise Node floor (#430)

Upgrade @babel/parser from 7.29.7 to 8.0.4 and raise the repository Node 22 minimum from 22.12.0 to 22.18.0 across package metadata, CI, and npm documentation.

No parser API migration was required. Validated with the full local suite and refreshed GitHub CI on Node 22.18.0 and Node 24.

Prepared and validated with AI assistance from OpenAI Codex under maintainer instructions.

package.json

@@ -24,7 +24,7 @@
     "url": "git+https://github.com/pbakaus/impeccable.git"
   },
   "engines": {
-    "node": ">=22.12.0"
+    "node": ">=22.18.0"
   },
   "type": "module",
   "bin": {
@@ -89,7 +89,7 @@
     "@ai-sdk/openai": "^4.0.7",
     "@anthropic-ai/claude-agent-sdk": "^0.3.165",
     "@anthropic-ai/sdk": "^0.115.0",
-    "@babel/parser": "^7.29.3",
+    "@babel/parser": "^8.0.4",
     "ai": "^7.0.14",
     "archiver": "^8.0.0",
     "playwright": "^1.59.1",