Add inline comments to improve readability of geoplot.py

[rashap224]

Issue Reference: Fixes #20

Description:
This pull request adds detailed inline comments to the geoplot.py file to improve its readability and help developers understand the purpose and logic of the code. The changes include:

• Clarifying the purpose of the GeoPlot class and its methods.
• Adding comments to explain the logic behind key sections of the code, such as data processing, GeoJSON generation, and HTML template rendering.

Impact:**

• Enhances code maintainability and developer experience.
• Reduces the time required to understand the codebase.

Acceptance Criteria:

• The file remains functionally unchanged.
• Comments are clear, concise, and meaningful.