docs: add LocalStack sponsor section to homepage and README

[macalbert]

Summary

Adds a LocalStack sponsor section to the Envilder website homepage and README. LocalStack has granted
Envilder an Ultimate open-source subscription, which powers the integration tests against real AWS SSM
and Azure Key Vault APIs. This change visually acknowledges their support.

Changes

• src/website/src/components/Sponsors.astro — new minimal sponsor strip (logo + label, theme-aware SVGs)
• src/website/public/localstack-on-light.svg — LocalStack horizontal color logo (light theme)
• src/website/public/localstack-on-dark.svg — LocalStack horizontal white logo (retro/dark theme)
• src/website/src/i18n/types.ts — added SponsorsTranslations interface
• src/website/src/i18n/{en,ca,es}.ts — added sponsor translations in all 3 locales
• src/website/src/pages/{index,ca/index,es/index}.astro — <Sponsors> added after <TrustBadges>
• README.md — added ## 💜 Sponsors section with theme-aware logo via #gh-dark-mode-only / #gh-light-mode-only

Testing

• pnpm lint passes (Biome pre-commit hook green)
• pnpm build:website passes — 9 pages built cleanly
• Visual validation at 375px, 768px, 1440px in both retro and light themes

Related

N/A

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Summary by CodeRabbit

• New Features
  • Added a sponsors section to the homepage featuring LocalStack with external link and two theme-specific logos.
• Localization
  • Added sponsors title and image alt translations for English, Spanish, and Catalan.
• Styling
  • Theme-aware logo visibility, responsive sizing, and hover/opacity styling.
• Placement
  • Sponsors section inserted into the homepage content flow across site variants.

[coderabbitai]

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Walkthrough

Adds a new localized Sponsors component that renders a themed LocalStack sponsor link with responsive styling; updates i18n types and translations; and inserts the component into English, Spanish, and Catalan homepages.

Changes

Cohort / File(s)	Summary
New Sponsors Component src/website/src/components/Sponsors.astro	Adds Sponsors.astro with optional lang prop (default 'en'), uses useTranslations(lang) for label and alt text, renders an external sponsor link with two theme-specific logo images, and includes component-scoped CSS to handle layout, responsiveness, and theme-based logo visibility via [data-theme] selectors.
Translation Type Definitions src/website/src/i18n/types.ts	Adds SponsorsTranslations interface and extends Translations to include sponsors: SponsorsTranslations.
Translation Strings src/website/src/i18n/en.ts, src/website/src/i18n/es.ts, src/website/src/i18n/ca.ts	Adds sponsors translation object to English, Spanish, and Catalan locales with title and localstackAlt keys.
Homepage Integration src/website/src/pages/index.astro, src/website/src/pages/es/index.astro, src/website/src/pages/ca/index.astro	Imports and renders <Sponsors lang={lang} /> on each homepage, placed after TrustBadges and before ProblemSolution.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

Suggested labels

enhancement

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The PR title claims to add LocalStack sponsor section to 'homepage and README', but the raw_summary shows only website components and translation files; README.md changes are not detailed in the provided summary.	Clarify whether README.md was actually modified in this PR. If it was, the title is accurate; if not, update the title to reflect that only the website homepage was modified.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description check	✅ Passed	The PR description covers the main changes, testing performed, and provides adequate context, though some template sections are not explicitly filled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feat/localstack-sponsor

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 1 additional finding.