Milestone M27 updates

Let's go through what we got done in Milestone M27 (Dec 30 - Jan 12).

Features:

• We’ve added the option to fully customize all theme colors, including detailed customization for the header, sidebar, and body. Therefore, there’s no longer a need to use custom CSS for color changes.

• The Knowledge Base search now opens in a modal, improving usability, offering greater customizability, and making it more convenient for keyboard navigation.

Bug Fixes:

• Resolved the issue where the search panel did not close automatically on mobile browsers.