fix: make shared package private and update changeset config

- Add private: true to @mcp-pointer/shared to prevent npm publishing
- Remove package linking in changeset config since shared is now private
- Add changeset for server-only release workflow fix

Author: elieteyssedou

.changeset/config.json

@@ -3,9 +3,7 @@
   "changelog": "@changesets/cli/changelog",
   "commit": false,
   "fixed": [],
-  "linked": [
-    ["@mcp-pointer/server", "@mcp-pointer/shared", "@mcp-pointer/chrome-extension"]
-  ],
+  "linked": [],
   "access": "public",
   "baseBranch": "main",
   "updateInternalDependencies": "patch",

.changeset/fix-private-shared-package.md

@@ -0,0 +1,9 @@
+---
+"@mcp-pointer/server": patch
+---
+
+Fix release workflow by making shared package private
+
+- Make @mcp-pointer/shared private to prevent npm publishing attempts
+- Update changeset configuration to remove package linking
+- Only @mcp-pointer/server will be published to npm going forward

packages/shared/package.json

@@ -1,5 +1,6 @@
 {
   "name": "@mcp-pointer/shared",
   "version": "0.3.1",
-  "type": "module"
+  "type": "module",
+  "private": true
 }