Add clang-format and workflow for consistency #21

[nikhiljangra264]

#21

1. Added clang-format rules to ensure consistency across source files.
2. Added a workflow test clang-format.yml to check code formatting on pull requests and when changes are made to the master branch.

[fffelix-huang]

Thanks! I'll be reviewing within couple days.

[fffelix-huang]

Hi

There are some small changes to be made.

[nikhiljangra264]

Hello @fffelix-huang, I have made some changes requested
Please let me know if theres anything

[nikhiljangra264]

apart from that I have added clang-format off and on at places like this

// clang-format off
constexpr std::pair<Value, Value> PieceSquareTable[PieceType::PIECE_NB][Square::SQ_NB] = {
    { // Pawn
        {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
        {166, 256}, {192, 256}, {204, 256}, {216, 256}, {216, 256}, {204, 256}, {192, 256}, {166, 256},
        {166, 256}, {192, 256}, {210, 256}, {242, 256}, {242, 256}, {210, 256}, {192, 256}, {166, 256},
        {166, 256}, {192, 256}, {220, 256}, {268, 256}, {268, 256}, {220, 256}, {192, 256}, {166, 256},
        {166, 256}, {192, 256}, {220, 256}, {242, 256}, {242, 256}, {220, 256}, {192, 256}, {166, 256},
        {166, 256}, {192, 256}, {210, 256}, {216, 256}, {216, 256}, {210, 256}, {192, 256}, {166, 256},
        {166, 256}, {192, 256}, {204, 256}, {216, 256}, {216, 256}, {204, 256}, {192, 256}, {166, 256},
        {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0}, {0, 0},
    },
}

to avoid formating on this code even if it exceeds the column width 100

[fffelix-huang]

Great! This is better than I expected :)
One last request is to add formatting to Makefile, (make format should apply clang-format all source codes including cpps and hpps).
After this I'll merge this PR!

[nikhiljangra264]

I have Added it. so we can run the make format command to format code.
Please take a look