feat: Add shortest paths placeholder function

[Sirivasv]

Fixes #36

[Copilot]

Pull Request Overview

This PR adds a placeholder implementation for shortest path calculation in the BMSSP (Bidirectional Multi-Source Shortest Path) class. The main changes include refactoring the shortest paths storage from an array to a Map and adding a basic calculateShortestPaths method.

• Refactored shortest paths storage from array of tuples to Map for better performance
• Extracted shortest paths initialization into a separate method
• Added placeholder calculateShortestPaths method that sets start node distance to 0

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
src/bmssp.mjs	Refactored shortest paths to use Map, extracted initialization method, added placeholder calculateShortestPaths
test/main.test.mjs	Updated tests to work with Map instead of array, added test for calculateShortestPaths method

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Codecov Report

✅ All modified and coverable lines are covered by tests.

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[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

Comments suppressed due to low confidence (1)

src/bmssp.mjs:1

• [nitpick] The test suite name 'BMSSP initialize calculateShortestPaths' is unclear. Consider renaming to 'BMSSP calculateShortestPaths' for better clarity.

class BMSSP {

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