Implement algorithm switching

This commit implements every algorithm I have played with so far. It also allows for you to switch which algorithm you want to use at runtime.

solver/src/algorithms/sha256.zig

@@ -0,0 +1,9 @@
+const std = @import("std");
+const Allocator = std.mem.Allocator;
+
+pub fn hash(allocator: Allocator, data: []const u8) ![]u8 {
+    const output_hash = try allocator.alloc(u8, std.crypto.hash.sha2.Sha256.digest_length);
+    std.crypto.hash.sha2.Sha256.hash(data, @ptrCast(output_hash), .{});
+
+    return output_hash;
+}