feat: navbar footer base template designs #32

Description

You need to implement the navbar and footer base template design using Bootstrap and Jinja templates.
The goal is to have a reusable base.html file that includes the navbar and footer so that all pages can extend from it.

Requirements

• Use Bootstrap (links below for reference).
• Create a Jinja navbar template (navbar.html) that only contains the <nav>...</nav> code.
• Create a footer template (footer.html) with a simple footer structure.
• Update/modify base.html to include both navbar.html and footer.html.
• Keep it simple and close to the designs/examples provided.

Resources

• Bootstrap Headers Example
• Bootstrap Navbar Docs
• Bootstrap Navbar Examples
• Bootstrap Fixed Navbar Example

Acceptance Criteria

• base.html exists and includes navbar.html and footer.html.
• Navbar is implemented with Bootstrap components.
• Footer is implemented with Bootstrap.
• Templates are kept simple and clean.