feat: Migrate Panel and related components to Astro

[google-labs-jules]

This commit migrates the React Panel component and all of its dependencies to Astro components. This is part of a larger effort to systematically migrate the website from React to Astro.

The following components were migrated:

• Panel
• ProFeaturesPanels
• ProDeveloperFeatures
• ProInfo
• ScreenshotsMarquee
• HeroPro
• AnimatedGradientBackground
• AppLink
• HeroProButtons
• PublicFacingApps
• BrowserFrame
• AgencyClientShowcase
• SharedResponsibilitySection
• DataSovereigntySection
• PrivacyComplianceSection
• TrustIndicatorsSection
• DeploymentModelsSection
• SecurityArchitectureSection
• CallToActionSection
• Translations
• TwoColumns
• DataEnhancementUseCases
• DataStructure
• AutofillFeature
• DataEnhancementHero
• VersionsToggle
• VersionsComparison
• Tip
• PricingQuote
• CLIInstructions
• EnterpriseFeatures
• PhoneFrame
• EnterpriseHero
• EnterpriseArchitectures
• AirTableLike
• History
• FeaturesCarousel
• DeveloperFeatures
• EasyToCustomize
• CustomFields
• OpenAITeaser
• UnbeatableUX
• ManageYour
• AgencyLogos
• BuiltFor
• FeaturesPanels
• FeaturesTeaser
• FireCMSIntro
• HeroHome
• LaunchInSteps
• OpenSourceDetails
• ProTeaser
• StartupLogos
• TechSplash
• UITeaser
• Newsletter
• ThreeColumns

All pages using these components have been updated to use the new Astro versions, and the original React files have been deleted.

Note: The frontend verification step was skipped due to a persistent issue with the cd command, which prevented the development server from starting.

---

PR created automatically by Jules for task 11928950125132444814

[google-labs-jules]

👋 Jules, reporting for duty! I'm here to lend a hand with this pull request.

When you start a review, I'll add a 👀 emoji to each comment to let you know I've read it. I'll focus on feedback directed at me and will do my best to stay out of conversations between you and other bots or reviewers to keep the noise down.

I'll push a commit with your requested changes shortly after. Please note there might be a delay between these steps, but rest assured I'm on the job!

For more direct control, you can switch me to Reactive Mode. When this mode is on, I will only act on comments where you specifically mention me with @jules. You can find this option in the Pull Request section of your global Jules UI settings. You can always switch back!

---

For security, I will only act on instructions from the user who triggered this task.