Change sun color from yellow to blue

[Copilot]

Summary

This PR changes the sun's color in the Solar System Simulation from yellow to blue as requested in issue #[issue_number].

Changes Made

Updated the sun rendering color in spaceManager.py from yellow (255, 255, 0) to blue (0, 0, 255).

Before:

color = (255, 255, 0)  # Yellow color for the sun

After:

color = (0, 0, 255)  # Blue color for the sun

Visual Impact

When the simulation runs, the central sun object will now be rendered in blue instead of yellow, while maintaining its prominent size (minimum radius of 8 pixels) and all other simulation behavior remains unchanged.

Testing

• ✅ Python syntax validation passed
• ✅ Module imports successfully
• ✅ All dependencies (numpy, pygame, numba) compatible
• ✅ Minimal change - only 1 line modified

Technical Details

The change updates the RGB color tuple used in the iterate() method of the SpaceManager class when drawing the sun (object at index 0). The new blue color uses maximum blue channel value (255) with zero red and green channels, creating a pure blue appearance.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Change sun color</issue_title>
<issue_description>Please change the color of the sun to blue instead of yellow.</issue_description>

Comments on the Issue (you are @copilot in this section)

Fixes #2

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[quintant]

LGTM

[quintant]

@copilot Ok, you can merge the changes.

[Copilot]

@copilot Ok, you can merge the changes.

I don't have the ability to merge pull requests. You'll need to merge the PR using the GitHub interface or the gh CLI tool. The changes are complete and ready to be merged.