[feat/fix]: A Star Search Improvement

[AshishYUO]

Description of Change

A Star Search Improvement:

1. Usage of shared_ptr for reduced object creation and slight performance improvement
2. Better readability for main algorithm.

Checklist

• Added description of change
• Added tests and example, test must pass
• Added documentation so that the program is self-explanatory and educational - Doxygen guidelines
• Relevant documentation/comments is changed or added
• PR title follows semantic commit guidelines
• I acknowledge that all my contributions will be made under the project's license.

Notes:

[ayaankhan98]

Just few improvements.

test.cpp: In lambda function:
test.cpp:558:31: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  558 |             for (int i = 0; i < first.get_size(); ++i) {
      |                             ~~^~~~~~~~~~~~~~~~~~
test.cpp:559:35: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  559 |                 for (int j = 0; j < first.get_size(); ++j) {
      |                                 ~~^~~~~~~~~~~~~~~~~~
test.cpp:562:39: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  562 |                     for (int k = 0; k < second.get_size(); ++k) {
      |                                     ~~^~~~~~~~~~~~~~~~~~~
test.cpp:563:43: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  563 |                         for (int l = 0; l < second.get_size(); ++l) {
      |                                         ~~^~~~~~~~~~~~~~~~~~~
test.cpp: In lambda function:
test.cpp:666:31: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  666 |             for (int i = 0; i < first.get_size(); ++i) {
      |                             ~~^~~~~~~~~~~~~~~~~~
test.cpp:667:35: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  667 |                 for (int j = 0; j < first.get_size(); ++j) {
      |                                 ~~^~~~~~~~~~~~~~~~~~
test.cpp:670:39: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  670 |                     for (int k = 0; k < second.get_size(); ++k) {
      |                                     ~~^~~~~~~~~~~~~~~~~~~
test.cpp:671:43: error: comparison of integer expressions of different signedness: ‘int’ and ‘size_t’ {aka ‘long unsigned int’} [-Werror=sign-compare]
  671 |                         for (int l = 0; l < second.get_size(); ++l) {
      |                                         ~~^~~~~~~~~~~~~~~~~~~

shell returned 1

[ayaankhan98]

LGTM 👍

[Panquesito7]

LGTM. Thanks for your contribution! 👍 🎉