refactor(workflow): fix tsconfig references, template imports, delete old packages/workflow

- Update root tsconfig.json references: replace packages/workflow with 6 new packages
- Update cli-workflow tsconfig references to new packages
- Add tsconfig references to workflow-util, workflow-runtime, workflow-execute
- Fix workflow-agent-llm, workflow-agent-cursor, workflow-agent-hermes, workflow-util-agent
  tsconfig references (../workflow -> ../workflow-runtime)
- Remove stale @uncaged/workflow deps from agent package.json files
- Change template packages to import buildDescriptor from @uncaged/workflow-register
- Normalize package.json exports field across all new packages
- Delete old packages/workflow/ directory

packages/workflow-cas/package.json

@@ -4,8 +4,8 @@
   "type": "module",
   "exports": {
     ".": {
-      "types": "./src/index.ts",
-      "default": "./src/index.ts"
+      "types": "./dist/index.d.ts",
+      "import": "./src/index.ts"
     }
   },
   "dependencies": {