Add Xcene IR Code Bank to Tools & Utilities

[lesalerno]

Describe the proposed change

Describe the change and rationale behind them. In case of a new link be, please describe what the link provides and why it is awesome!

The link

Add the link here.

The annoying "I agree" thing

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[github-actions]

Checking 1 entry out of 325 total.

Awesome list validation

✅ All checks passed -- validated 1 entry.

Entries checked

Entry	Section	URL
Xcene IR Code Bank	Tools & Utilities	https://xcene.com.br/codigos-ir.html

What was checked

• URL hygiene (HTTPS, no shorteners, no duplicates, no tracking params)
• Repository status (not archived, age ≥6 months, last push <18 months)
• License (OSI-approved; CC accepted for Other Awesome Lists)
• README presence and Home Assistant mention
• HACS structure (hacs.json) for Custom Integrations and Custom Cards

Full criteria: .github/CONTRIBUTING.md.

[lesalerno]

The failing Lychee check is unrelated to this PR — it's a pre-existing broken link (https://diyfuturism.com/ at README line 700), not the entry I added. My link (https://xcene.com.br/codigos-ir.html) passes Lychee (HTTP 200). Happy to adjust wording or placement on my entry if needed.