Design App Name & Logo & Theming

[umitcan07]

🧱 Description

We should have all the branding and theming for the new application.

To be reviewed by: @hks1444

📋 Acceptance Criteria

• [x] We have our app name, logo, colors & themes In the Figma file
• [x] Relevant Wiki documents (Sidebar & Home) are updated.

[umitcan07]

We will use turquoise color again with the app name "turquiz", emphasizing turkish people and quiz feature of the app.

[umitcan07]

I will add the assets into Wiki now

[umitcan07]

[hks1444]

It looks great. Wiki is updated and figma has app name, colors, logo and themes.