Update instructions, add cursor install link (#159)

closes #156

Author: jakemac53

pkgs/dart_mcp_server/README.md

@@ -1,5 +1,7 @@
 The Dart Tooling MCP Server exposes Dart and Flutter development tool actions to compatible AI-assistant clients.
 
+[![Add to Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/install-mcp?name=dart_tooling&config=eyJ0eXBlIjoic3RkaW8iLCJjb21tYW5kIjoiZGFydCBtY3Atc2VydmVyIC0tZXhwZXJpbWVudGFsLW1jcC1zZXJ2ZXIgLS1mb3JjZS1yb290cy1mYWxsYmFjayJ9)
+
 ## Status
 
 WIP. This package is still experimental and is likely to evolve quickly.
@@ -34,6 +36,18 @@ This server only supports the STDIO transport mechanism and runs locally on
 your machine. Many of the tools require that your MCP client has `roots`
 support, and usage of the tools is scoped to only these directories.
 
+If you are using a client that claims it supports roots but does not actually
+set them, pass `--force-roots-fallback` which will instead enable tools for
+managing the roots.
+
+### Running from the SDK
+
+For most users, you should just use the `dart mcp-server` command. For now you
+also need to provide `--experimental-mcp-server` in order for the command to
+succeed.
+
+### Running a local checkout
+
 The server entrypoint lives at `bin/main.dart`, and can be ran however you
 choose, but the easiest way is to run it as a globally activated package.
 
@@ -85,20 +99,26 @@ dart run dart_mcp_examples:workflow_client --server dart_mcp_server
 
 ### With Cursor
 
-Go to Cursor -> Settings -> Cursor Settings and select "MCP".
+The following button should work for most users:
+
+[![Add to Cursor](https://cursor.com/deeplink/mcp-install-dark.svg)](https://cursor.com/install-mcp?name=dart_tooling&config=eyJ0eXBlIjoic3RkaW8iLCJjb21tYW5kIjoiZGFydCBtY3Atc2VydmVyIC0tZXhwZXJpbWVudGFsLW1jcC1zZXJ2ZXIgLS1mb3JjZS1yb290cy1mYWxsYmFjayJ9)
+
+To manually install it, go to Cursor -> Settings -> Cursor Settings and select "MCP".
 
-Then, click "Add new global MCP server". Assuming you have already globally
-activated the package and it is on  your path, you can add
-`dart_mcp_server` as the command.
+Then, click "Add new global MCP server".
 
 If you are directly editing your mcp.json file, it should look like this:
 
-```yaml
+```json
 {
   "mcpServers": {
     "dart_mcp": {
-      "command": "dart_mcp_server",
-      "args": []
+      "command": "dart",
+      "args": [
+        "mcp-server",
+        "--experimental-mcp-server",
+        "--force-roots-fallback"
+      ]
     }
   }
 }