fix: Build documentation at compilation

Some documentation was broken. I refactored it to be declarative now the
project build correctly and produce XML documentation.

WhiteMagic/Assembly/StubAssembler.cs

@@ -30,8 +30,10 @@ public sealed class StubAssembler : IAssembler
 
     // ── Emit primitives ────────────────────────────────────────────────────
 
+    /// <summary>Emits a single byte into the buffer.</summary>
     public void EmitU8(List<byte> buffer, byte value) => buffer.Add(value);
 
+    /// <summary>Emits a 32-bit little-endian integer into the buffer.</summary>
     public void EmitU32(List<byte> buffer, uint value)
     {
         buffer.Add((byte)value);
@@ -40,6 +42,7 @@ public sealed class StubAssembler : IAssembler
         buffer.Add((byte)(value >> 24));
     }
 
+    /// <summary>Emits a 64-bit little-endian integer into the buffer.</summary>
     public void EmitU64(List<byte> buffer, ulong value)
     {
         EmitU32(buffer, (uint)value);