Refactor theme colors and styles; remove unused favicon; update translations and layouts

- Deleted unused favicon file.
- Updated Tailwind CSS configuration to redefine primary and secondary colors.
- Adjusted button styles in CSS to use new color definitions.
- Removed English translations and added French translations for various UI elements.
- Created new layouts for features and updated existing layouts to reflect new design.
- Modified header and CTA components to use updated color scheme.
- Cleaned up pricing table shortcode to align with new styles.
- Updated theme metadata to reflect new author and project details.

themes/chill-theme/layouts/partials/components/subscribe-form.html

@@ -34,7 +34,7 @@
 
         <button
             type="submit"
-            class="w-full px-4 py-2 bg-primary-600 text-white rounded-lg hover:bg-primary-700 transition-colors duration-200"
+            class="w-full px-4 py-2 bg-primary-400 text-white rounded-lg hover:bg-primary-700 transition-colors duration-200"
         >
             {{ if .buttonText }}{{ .buttonText }}{{ else }}{{ if eq $lang "zh-cn" }}订阅{{ else }}Subscribe{{ end }}{{ end }}
         </button>