chore: bump ext-apps to 1.1.2 (#503)

* chore: bump ext-apps to 1.1.2

Changes since 1.1.1:
- feat: add ui/download-file method for host-mediated file downloads (#475)
- pdf-server: robust path validation + folder/file root support (#497)
- ci: auto-fix prettier formatting in pre-commit hook and CI (#498)

* fix: sync local SDK build into node_modules for examples

npm workspaces hoists example dependencies to the root node_modules,
but installs the published registry copy of @modelcontextprotocol/ext-apps
instead of linking to the local source. This causes type-check failures
when examples use features not yet published to npm.

Add scripts/link-self.mjs which copies the freshly-built dist/ and
package.json into the hoisted node_modules copy after each SDK build,
ensuring examples always type-check against the latest local types.

See: https://github.com/npm/feedback/discussions/774

* Revert "fix: sync local SDK build into node_modules for examples"

This reverts commit e3387e8434f3def030f5a223a70632092c929119.

examples/basic-server-preact/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/server-basic-preact",
-  "version": "1.1.1",
+  "version": "1.1.2",
   "type": "module",
   "description": "Basic MCP App Server example using Preact",
   "repository": {