UI Enhancements and Frontmatter Validation Fixes

[jesusalbujas]

UI Enhancements and Frontmatter Validation Fixes

Description

This PR introduces several UI/UX improvements to the documentation site and resolves a large number of validation warnings related to page metadata.

Changes Made:

🛠️ Core and Validation Fixes

• Massive Frontmatter Correction: Refactored 404 Markdown files within src/downloads/updates/.
  • Issue: Date-formatted tags (e.g., 2021-08-27) were being interpreted as Date objects by the YAML parser instead of strings.
  • Fix: Wrapped all date-like tags in double quotes to comply with the theme's schema and suppress validation warnings during the build.
• Sass Warning Suppression: Updated .vuepress/config.ts to include quietDeps: true for the SCSS preprocessor. This silences internal deprecation warnings (like mixed-decls) coming from third-party dependencies (vuepress-theme-hope and vuepress-shared).

✨ UI/UX Improvements

• New Animated Splash Screen: Developed and integrated a custom SplashScreen.vue component.
  • Features the ERPyA logo with a smooth "shimmer" loading bar.
  • Configured with a 3-second display time and a 5-second maximum fallback to ensure a premium initial loading experience.
  • Registered globally via client.ts for consistent behavior.
• Home Page Hero Cleanup: Refined src/README.md by removing redundant hero text and logos, focusing the user's attention on the background and main navigation.

Impact:

• Clean builds: Zero YAML linting errors across the entire update history.
• Branding: Better visual consistency with the new splash screen entry.
• Maintenance: Reduced noise in the console/terminal during development.

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