Fixes #163: About section added

[Ujjwalrai01]

Added About Section

• Created and designed the About Us section using HTML, CSS, and JavaScript.
• Added detailed content about the Wardha Metro Flow project, including Vision, Mission, and Key Features.
• Ensured responsive design and consistent styling across devices.
• Enhanced user experience with minor animations and clean layout.

[github-actions]

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[Ujjwalrai01]

Hello! @Manjushwarofficial I have worked on this issue, can you please review and merge?