refactor: optimize StarsLoader and adjust package structure

Moved `StarsLoader` to the correct package `com.github.lookupgroup27.lookup.model.map.stars`.
Removed unnecessary import of `StarDataRepository`.
Simplified the creation of `Star` objects by removing the redundant `color` parameter.

Affected files:
- `StarsLoader.kt`: Adjusted package declaration, imports, and star creation logic.

app/src/main/java/com/github/lookupgroup27/lookup/model/map/stars/StarsLoader.kt

@@ -1,8 +1,7 @@
-package com.github.lookupgroup27.lookup.model.loader
+package com.github.lookupgroup27.lookup.model.map.stars
 
 import android.content.Context
 import com.github.lookupgroup27.lookup.model.map.renderables.Star
-import com.github.lookupgroup27.lookup.model.map.stars.StarDataRepository
 
 /**
  * Converts star data into renderable objects for OpenGL rendering.
@@ -26,7 +25,6 @@ class StarsLoader(private val context: Context, private val repository: StarData
       Star(
           context = context,
           position = floatArrayOf(starData.x.toFloat(), starData.y.toFloat(), starData.z.toFloat()),
-          color = floatArrayOf(1.0f, 1.0f, 1.0f),
           size = 0.002f)
     }
   }