UI Updat and Bug fix part 1.5

[Rainb0wKey]

➕ Added

• Added shadow for sidebar;
• Added shadow for tables;
• Added border radius fro page hover;
• Added radius for tables;
• Added animation for table hover.

🔍 Updated

• Updated theme color.

🗑️ Deleted

• Delete number near the pages in sidebar.

⚠️ Warning:

• The most weird bug related to sidebar is still not fiixed, we don't know to fix it;
• Bug with breadcrumbs is still not fixed;
• Bug with 404 page probably will be fixed after marge with default wiki!

🗺️ Flowcharts

• We will add more flowchart functions soon!
• Flowchart guide will be also added in next pull request.

🚧 To-do

We are updated tables design, our next goal is add image animation, update favicon.png file with new avatar and add footer to all pages. Everything is still same with #423 To-do's list. Also I'm planned to update foreword.md page to the better style!