Replace redis-rb-cluster examples with official Valkey GLIDE client using original Ruby logic

[Copilot]

This PR replaces all code examples using redis-rb-cluster in the cluster tutorial with examples using the official Valkey GLIDE Node.js client, while preserving the original Ruby example's logic and behavior.

Problem

The redis-rb-cluster library referenced in the cluster tutorial:

• Doesn't contain a LICENSE file, making it technically not open source
• Is maintained by antirez and not officially supported by Valkey
• Uses Ruby, which may be less accessible to some developers

Changes Made

Code Examples

• Replaced Ruby example with comprehensive Node.js example using @valkey/valkey-glide
• Preserved original logic: SET key → GET verification → SET counter → delay pattern
• Updated installation instructions with npm install @valkey/valkey-glide
• Modernized code style using async/await syntax and proper error handling
• Maintained same timing with 100ms delays matching Ruby's 0.1 second sleep
• Added retry logic for counter initialization matching Ruby's while loop behavior

Documentation Updates

• Section title: "Write an example app with redis-rb-cluster" → "Write an example app with Valkey GLIDE"
• Table of contents: Updated to reflect new section name
• Links: All references now point to official Valkey GLIDE repository
• Command examples: Updated from ruby example.rb to node example.js
• Output examples: Updated to show individual value verification (1, 2, 3...) matching original behavior

Example Comparison

Before (Ruby):

rc.set("foo#{x}",x)
puts rc.get("foo#{x}")
rc.set("__last__",x)
sleep 0.1

After (Node.js with equivalent logic):

await client.set(`foo${x}`, x.toString());
const value = await client.get(`foo${x}`);
console.log(value);
await client.set("__last__", x.toString());
await new Promise(resolve => setTimeout(resolve, 100));

The new examples maintain the exact same educational value and behavior while using an officially supported, properly licensed Valkey client library. The implementation ensures compatibility with cluster deployments and preserves the original example's demonstration of cluster operations under real-world conditions.

Fixes #147.

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[avifenesh]

@copilot use valkey-glide nodejs https://github.com/valkey-io/valkey-glide/tree/main/node

[Copilot]

@copilot use valkey-glide nodejs https://github.com/valkey-io/valkey-glide/tree/main/node

Updated the implementation to use the official Valkey GLIDE Node.js API from the specified repository. Fixed the client configuration structure, updated timeout settings, and added clientName parameter to match the official documentation examples. Commit: 8fd3fad

[Copilot]

remove the html files

The HTML files were already removed in a previous commit (8c0482a). The repository is now clean of any HTML test files.

[avifenesh]

@copilot open a follow up issue with @asafpamzn points