Changed GpuProcess to use a definition

Now GpuProcess isnt limited to 2 in, 1 out but to anything.

examples/add.zig

@@ -18,7 +18,17 @@ pub fn main(init: std.process.Init) !void {
     const gloc = grena.gpuAllocator();
 
     // 3. Load the WGSL compute pipeline
-    const add_process = try GpuProcess.init(device, @embedFile("shaders/add.wgsl"));
+    const add_process = try GpuProcess.init(
+        device,
+        @embedFile("shaders/add.wgsl"),
+        .{
+            .bindings = &.{
+                .{ .element_size = @sizeOf(f16) },
+                .{ .element_size = @sizeOf(f16) },
+                .{ .element_size = @sizeOf(f16) },
+            },
+        },
+    );
     defer add_process.deinit();
 
     // 4. Setup CPU data
@@ -49,7 +59,7 @@ pub fn main(init: std.process.Init) !void {
 
     // 7. Dispatch the Compute Process
     // We pass the data type (f16) to allow GpuProcess to calculate chunks correctly
-    try add_process.run(gloc, f16, buf_a, buf_b, buf_out);
+    try add_process.run(gloc, .{ buf_a, buf_b, buf_out });
 
     // 8. Map and copy the resulting buffer back to the CPU
     const out = try buf_out.read(allocator, f16);