[fix/docs]: improve the Jump Game algorithm

[Panquesito7]

Description of Change

• Improve the Jump Game algorithm.
  • Fix segmentation fault.
  • Improved documentation.
  • Added missing namespace (greedy_algorithms).
  • Used proper filename with snake_case.
  • Added 3 extra tests.

Checklist

• [x] Added description of change
• [x] Added file name matches File name guidelines
• [x] Added tests and example, test must pass
• [x] Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
• [x] Relevant documentation/comments is changed or added
• [x] PR title follows semantic commit guidelines
• [x] Search previous suggestions before making a new one, as yours may be a duplicate.
• [x] I acknowledge that all my contributions will be made under the project's license.

Notes:

[Panquesito7]

I just noticed something very wrong in the algorithm 😅 works in the tests but not for everything. Will fix it ASAP.

[github-actions[bot]]

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[github-actions[bot]]

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