Closes #74 – Improve Readability of geoplot.py with Inline Comments

[dhruvdk3]

Summary

This PR adds clear, concise inline comments throughout src/visualize/geoplot.py to enhance code readability and developer onboarding. The comments clarify:

• The purpose of each import and utility function
• How the HTML/Cesium template integrates with the Python logic
• Each major section of the GeoPlot.render() method (coordinate extraction, timestamping, GeoJSON generation, template substitution)
• Time-series entity construction logic in the embedded JavaScript

Changes Made

• Added file-level docstring to describe module usage
• Added inline comments to:
  • all imports
  • read_var() helper
  • the GeoPlot class, its constructor, and render() method
  • JSON building logic and timestamp generation
  • Cesium template JS functions and rendering flow

Scope

• No code logic changed
• Fully PEP8-compliant
• Linted using flake8 locally
• File generates .geojson and .html correctly

Testing

• Performed a manual smoke test with test.py using dummy trajectory data
• Verified that test_run.geojson and test_run.html were created
• Opened HTML in browser and verified Cesium viewer rendered correctly