Add Teamwork.com MCP server to registry (github#164)

* Add Teamwork.com MCP server to registry

Adds the official Teamwork.com MCP server to the registry:
https://github.com/Teamwork/mcp

The MCP server is available at:
https://mcp.ai.teamwork.com

Additional information can be found at:
https://www.teamwork.com/product/ai/

* Fix: Default Dockerfile entrypoint is now the STDIO mode

Applied changes to the Dockerfile to run the STDIO binary by default.

* Enhancement: Adjust server config to better match template reference

Author: rafaeljusto

servers/teamwork/server.yaml

@@ -0,0 +1,23 @@
+name: teamwork
+image: mcp/teamwork
+type: server
+meta:
+  category: productivity
+  tags:
+    - ai
+    - artificial-intelligence
+    - teamwork
+about:
+  title: Teamwork
+  description: Tools for Teamwork.com products.
+  icon: https://avatars.githubusercontent.com/u/4037476?v=4
+source:
+  project: https://github.com/teamwork/mcp
+  branch: main
+config:
+  description: Configure the connection to Teamwork.com MCP server
+  secrets:
+    - name: teamwork.tw_mcp_bearer_token
+      env: TW_MCP_BEARER_TOKEN
+      example: <TW_MCP_BEARER_TOKEN>
+      required: true