fix: Remove CSS 404 errors and invalid preloads

Remove enqueues of non-existent CSS files (render blocking 404s):
- Remove componente-footer-principal.css from roi_enqueue_header()
- Remove roi_enqueue_social_share_styles() (SocialShareRenderer generates CSS)
- Remove roi_enqueue_footer_contact_assets() (ContactFormRenderer generates CSS)

Fix preloads in performance.php:
- Remove inter-var.woff2 preloads (fonts don't exist, using Poppins)
- Fix fonts.css reference to css-global-fonts.css

Minor: Update contact-form default info_value_color

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

schemas/contact-form.json

@@ -262,7 +262,7 @@
         "info_value_color": {
           "type": "color",
           "label": "Color valores info",
-          "default": "#AAAAAA",
+          "default": "#D5D8DA",
           "editable": true,
           "description": "text-muted"
         },