Smoothen the process of getting started (#103)

* Restructure threejs-server README to match marketing examples

- Update title format to "Example: Three.js App"
- Constrain screenshot width using table layout
- Add Features section with key capabilities
- Reorganize Running section with Tool Input subsection
- Add Architecture section describing server and app components
- Remove implementation-focused sections (WidgetProps, Creating a New Widget)

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Add bun as devDependency to example packages

npm install now automatically installs bun, eliminating the need for
separate installation instructions. Removed manual bun install step
from customer-segmentation-server README.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Add start:http and start:stdio npm scripts to examples

For the 6 examples supporting --stdio transport, add explicit scripts:
- serve:http / serve:stdio for running the server
- start:http / start:stdio for build + serve
- start now aliases to start:http for backward compatibility

Update READMEs to document both transport options.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Default basic-host SERVERS to localhost:3001/mcp

- Change threejs-server default port from 3109 to 3001 for consistency
- Add default SERVERS value in basic-host serve.ts
- Document SERVERS env var in basic-host README

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

* Improve Examples section in README

Frame the three basic examples as foundational starting points and
add a link to the examples directory for additional demo apps.

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

examples/customer-segmentation-server/package.json

@@ -6,9 +6,12 @@
   "scripts": {
     "build": "INPUT=mcp-app.html vite build",
     "watch": "INPUT=mcp-app.html vite build --watch",
-    "serve": "bun server.ts",
-    "start": "NODE_ENV=development npm run build && npm run serve",
-    "dev": "NODE_ENV=development concurrently 'npm run watch' 'npm run serve'"
+    "serve:http": "bun server.ts",
+    "serve:stdio": "bun server.ts --stdio",
+    "start": "npm run start:http",
+    "start:http": "NODE_ENV=development npm run build && npm run serve:http",
+    "start:stdio": "NODE_ENV=development npm run build && npm run serve:stdio",
+    "dev": "NODE_ENV=development concurrently 'npm run watch' 'npm run serve:http'"
   },
   "dependencies": {
     "@modelcontextprotocol/ext-apps": "../..",
@@ -20,6 +23,7 @@
     "@types/cors": "^2.8.19",
     "@types/express": "^5.0.0",
     "@types/node": "^22.0.0",
+    "bun": "^1.3.2",
     "concurrently": "^9.2.1",
     "cors": "^2.8.5",
     "express": "^5.1.0",