fix: Remove devEngines from package.json

Dependabot's npm updater rejects devEngines.packageManager.version
ranges that use "||", failing with "Invalid package manager
specification in package.json. The packageManager field must specify
a valid semver version." This has silently broken all npm version
updates on this repo since #595 introduced the field.

engines already communicates the Node/npm requirement to contributors
and CI without hard-failing external tooling, so devEngines is dropped
rather than pinned to a single version that would need to track
whatever runtime Dependabot's sandbox happens to use.

Author: razor-x

package.json

@@ -17,16 +17,6 @@
     "node": ">=22.11.0",
     "npm": ">=10.9.4"
   },
-  "devEngines": {
-    "runtime": {
-      "name": "node",
-      "version": "^24.11.0 || ^22.11.0"
-    },
-    "packageManager": {
-      "name": "npm",
-      "version": "^11.0.0 || ^10.9.4"
-    }
-  },
   "devDependencies": {
     "@seamapi/blueprint": "^1.8.0",
     "@seamapi/fake-seam-connect": "2.0.4",