Simplify Sector Class by Removing Redundant Parameters

[irvanalhaq9]

Overview: What does this pull request change?

This pull request refines the Sector class by removing the redundant parameters inner_radius and outer_radius, simplifying the constructor to accept only a single radius parameter. The inner_radius is now automatically set to 0, reflecting the true geometric nature of a sector.

Motivation and Explanation: Why and how do your changes improve the library?

Currently, the Sector class in Manim inherits parameters, including inner_radius and outer_radius, from the AnnularSector class.
This makes the Sector class exactly the same as the AnnularSector class. This is why the examples given in the Manim Documentation for the Sector class are examples of AnnularSector.

Actually, the Sector is conceptually a special case of AnnularSector where inner_radius should always be 0. This means that the Sector class should only require a single parameter, radius, which is then directly passed to outer_radius of AnnularSector.

Links to added or changed documentation pages

Further Information and Comments

The examples provided in the Manim documentation for the Sector class actually depict scenarios that are more representative of the AnnularSector class. This highlights the confusion caused by the redundant parameters.

1. Current Documentation Example of Sector:
   
   That example is similar to Example of AnnularSector:
   

2. Correct Sector Representation
   The following image depicts what a Sector should look like when only the radius is provided, with inner_radius set to 0. It accurately represents a sector, demonstrating how the simplified constructor correctly models this geometric shape.
   

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested

[JasonGrace2282]

This seems fine to me, thanks

[irvanalhaq9]

This seems fine to me, thanks

Thanks for reviewing and accepting the changes! I appreciate it.