- Added a progress indicator to the output

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- Structured project with lib and main
- Added appropriate Cargo.toml files
- Implemented the Vector3 struct with necessary traits

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- Added Color struct to represent RGB
- Write pixel color to the standard output stream

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- Created a class for the Ray
- Added Point class
- Impl Add trait for Vec3 and Point

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-  Calculate the ray from the “eye” through the pixel
-  Create a blue gradient (linear blend)

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- Added coondition of intersection of ray with sphere

TODO: Fix the sphere not appearing

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- Fixed issue where red sphere not showing in the
ppm image.
- Error in calculating the location of upper left pixel

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Fixes #2