Added ruby how-to examples

[Aryex]

Summary

Added Ruby documentation for Ruby 1.0.0 release. This covers only the how-to guides.

Related

#299

Content Changes

Ruby tabs added to:

• Getting connected: installation, client-initialization.
• Connections: configure-lazy-connection, limit-inflight-requests,
  read-strategy, timeouts-and-reconnect-strategy,
  resilience-best-practices.
• Commands & scripting: send-batch-commands, execute-custom-commands,
  execute-custom-scripts, load-and-execute-functions.
• Monitoring: open-telemetry, tracking-resources.
• Security: authentication, tls.
• Modules: modules-api/json-module, modules-api/search-module.

Features the Ruby client does not yet support are intentionally omitted. Where a page has a section for an
unsupported feature, the Ruby tab is left out of that section only.

Implementation

Ruby examples were generated per page, then verified by executing every added
snippet against the published valkey-glide-rb 1.0.0.pre.rc2 gem with live
standalone, cluster, and TLS servers (started via cluster_manager.py).

Testing

• pnpm build runs successfully (110 pages, internal links validated).
• pnpm format applied.
• Added Ruby snippets executed against the real 1.0.0.pre.rc2 gem across
  standalone/cluster/TLS/auth.
• The two modules-api pages were reviewed for API correctness against the
  Ruby client source but not executed (require server modules); JSON/vector
  method names and argument shapes were checked against
  valkey-glide-ruby at v1.0.0-rc2.

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one issue.
• Commit message has a detailed description of what changed and why.
• All commits are signed off with --signoff flag.
• pnpm build runs successfully.
• Links have been checked for validity.
• Destination branch is correct - main or release
• Create merge commit if merging release branch into main, squash otherwise.