Feature/load save game

[ttugrul]

Save and load functionality added.

[codecov-io]

Codecov Report

Merging #25 (817ae61) into master (4eba2c0) will decrease coverage by 0.28%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master      #25      +/-   ##
============================================
- Coverage     88.38%   88.10%   -0.29%     
  Complexity      122      122              
============================================
  Files            11       11              
  Lines           310      311       +1     
  Branches         48       48              
============================================
  Hits            274      274              
- Misses           21       22       +1     
  Partials         15       15              

Impacted Files	Coverage Δ	Complexity Δ
...c/main/java/pl/nogacz/chess/board/Coordinates.java	76.92% <0.00%> (-6.42%)	12.00 <0.00> (ø)

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[cagdasgerede]

@ttugrul
Yaptığın değişiklikleri anlattığın ve oyunu çalıştırıp demo yaptığın kısa bir video çekip YouTube linkini buradan paylaş.

[ttugrul]

https://youtu.be/Q-lBbRCBiVM
Proje raporu: https://drive.google.com/file/d/1mVqSffR_nre6nw1a7uUza5DJj3eVR-lE/view?usp=sharing