Add Bellman-Ford Algorithm, Related LeetCode Problems, and CRC Implementation in Java

[PThanushree]

Issue Description:

I would like to contribute implementations of the Bellman-Ford algorithm in Java, along with related LeetCode problems and Cyclic Redundancy Check (CRC) code.

Proposed additions:

Bellman-Ford Algorithm (Java)
Single-source shortest path for graphs with negative weights.
Detects negative weight cycles.

Related LeetCode Problems:

LeetCode 743 – Network Delay Time
LeetCode 787 – Cheapest Flights Within K Stops

Implementation of standard CRC algorithm in java.

Benefits:

Provides reusable and well-documented Java implementations.
Helps learners understand Bellman-Ford and CRC algorithms.
Covers both standard algorithms and constrained/real-world applications.
@Nikhil-2002 Kindly assign this to me under Hactoberfest'25 by including all related tags.

[PThanushree]

I would like to add these programs, @Nikhil-2002 Can you assign me this under HactoberFest'25 with adding all related tags