Genetic Algorithm (n-Queens)

[nickumia]

Notes:

• Refactor blind to blindsearch and informed to localsearch
• Add GeneticSearch algorithm that is (mostly) environment-agnostic
  • GeneticSearch has n-queens specific optimization code in it to fix_missing if there are duplicated queens
  • GeneticSearch has n-queens specific optimization code in it to mutate to only swap queens and not to randomly mutate any index
• Add NQueensGeneticEncoding that wraps NQueens into a genetic algorithm-compatible form
• (Important) Change the numbers for n-queens from [0, n-1] to [1, n]
• Add test script for genetic n-queens algorithm