Update docs: domain-based auth lookup, no connection IDs needed

Connection IDs are no longer stored in settings.json. The applier
finds auth connections by domain (linkedin.com, wellfound.com) at
runtime via the Kernel SDK. Updated SKILL.md, README.md, and bumped
to 0.1.4.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "claw-apply",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "description": "Automated job search and application for LinkedIn and Wellfound",
   "type": "module",
   "scripts": {