adding descriptor writes for storage buffers

src/soft/device/ComputeRoutines.zig

@@ -0,0 +1,29 @@
+const std = @import("std");
+const vk = @import("vulkan");
+const base = @import("base");
+const spv = @import("spv");
+
+const SoftDevice = @import("../SoftDevice.zig");
+const SoftPipeline = @import("../SoftPipeline.zig");
+
+const VkError = base.VkError;
+
+const Self = @This();
+
+device: *SoftDevice,
+pipeline: ?*SoftPipeline,
+
+pub fn init(device: *SoftDevice) Self {
+    return .{
+        .device = device,
+        .pipeline = null,
+    };
+}
+
+pub fn destroy(self: *Self) void {
+    _ = self;
+}
+
+pub fn bindPipeline(self: *Self, pipeline: *SoftPipeline) void {
+    self.pipeline = pipeline;
+}