Implement PEXT bitboards for bishop and rook attacks

[eduherminio]

Score of Lynx 1712 - pext vs Lynx 1706 - main: 5927 - 5819 - 4034  [0.503] 15780
...      Lynx 1712 - pext playing White: 3740 - 2139 - 2012  [0.601] 7891
...      Lynx 1712 - pext playing Black: 2187 - 3680 - 2022  [0.405] 7889
...      White vs Black: 7420 - 4326 - 4034  [0.598] 15780
Elo difference: 2.4 +/- 4.7, LOS: 84.0 %, DrawRatio: 25.6 %
SPRT: llr -0.107 (-3.6%), lbound -2.94, ubound 2.94

C:\dev\sprt [main ≡]> python3 .\sprt.py --wins 5930 --losses 5823 --draws 4037 --elo0 -5 --elo1 0
ELO: 2.35 +- 4.67 [-2.31, 7.02]
LLR: 3.85 [-5.0, 0.0] (-2.94, 2.94)
H1 Accepted

 * BenchmarkDotNet v0.13.9+228a464e8be6c580ad9408e98f18813f6407fb5a, Ubuntu 22.04.3 LTS (Jammy Jellyfish)
 * Intel Xeon Platinum 8171M CPU 2.60GHz, 1 CPU, 2 logical and 2 physical cores
 * .NET SDK 8.0.100-rc.2.23502.2
 *   [Host]     : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
 *   DefaultJob : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
 *
 *
 * | Method       | Mean     | Error   | StdDev  | Ratio | Allocated | Alloc Ratio |
 * |------------- |---------:|--------:|--------:|------:|----------:|------------:|
 * | MagicNumbers | 378.1 ns | 6.19 ns | 5.79 ns |  1.00 |         - |          NA |
 * | PEXT         | 229.7 ns | 2.79 ns | 2.61 ns |  0.61 |         - |          NA |
 *
 * BenchmarkDotNet v0.13.9+228a464e8be6c580ad9408e98f18813f6407fb5a, Windows 10 (10.0.20348.2031) (Hyper-V)
 * Intel Xeon CPU E5-2673 v4 2.30GHz, 1 CPU, 2 logical and 2 physical cores
 * .NET SDK 8.0.100-rc.2.23502.2
 *   [Host]     : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
 *   DefaultJob : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
 *
 *
 * | Method       | Mean     | Error   | StdDev   | Ratio | RatioSD | Allocated | Alloc Ratio |
 * |------------- |---------:|--------:|---------:|------:|--------:|----------:|------------:|
 * | MagicNumbers | 408.9 ns | 8.14 ns | 13.59 ns |  1.00 |    0.00 |         - |          NA |
 * | PEXT         | 326.3 ns | 6.46 ns |  7.93 ns |  0.79 |    0.03 |         - |          NA |
 *
 * BenchmarkDotNet v0.13.9+228a464e8be6c580ad9408e98f18813f6407fb5a, macOS Monterey 12.6.9 (21G726) [Darwin 1.6.0]
 * Intel Core i7-8700B CPU 3.20GHz (Max: 3.19GHz) (Coffee Lake), 1 CPU, 4 logical and 4 physical cores
 * .NET SDK 8.0.100-rc.2.23502.2
 *   [Host]     : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
 *   DefaultJob : .NET 8.0.0 (8.0.23.47906), X64 RyuJIT AVX2
 *
 *
 * | Method       | Mean     | Error    | StdDev   | Ratio | RatioSD | Allocated | Alloc Ratio |
 * |------------- |---------:|---------:|---------:|------:|--------:|----------:|------------:|
 * | MagicNumbers | 436.3 ns | 28.75 ns | 84.33 ns |  1.00 |    0.00 |         - |          NA |
 * | PEXT         | 274.5 ns | 20.23 ns | 58.69 ns |  0.66 |    0.19 |         - |          NA |
 *
 */