Bundle .d.ts files when building project

[mrm007]

This PR bundles .d.ts files generated by Preconstruct to avoid errors in downstream dependencies.

e.g. When compiling Braid with the current version of vanilla-extract:

import * as _vanilla_extract_sprinkles_dist_declarations_src_createSprinkles from "@vanilla-extract/sprinkles/dist/declarations/src/createSprinkles";
import { StyleRule } from "@vanilla-extract/css";
// ...

declare const vars: {
  grid: any;
  space: any;
  touchableSize: any;
  contentWidth: any;
  backgroundColor: any;
  foregroundColor: any;
  textWeight: any;
  borderColor: any;
  borderRadius: any;
  borderWidth: any;
  shadow: any;
};

After the change:

import * as _vanilla_extract_sprinkles from "@vanilla-extract/sprinkles";
import { StyleRule } from "@vanilla-extract/css";
// ...

declare const vars: {
  grid: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
  space: {
    gutter: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
    xxsmall: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
    xsmall: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
    small: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
    medium: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
    large: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
    xlarge: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
    xxlarge: `var(--${string})` | `var(--${string}, ${string})` | `var(--${string}, ${number})`;
  };
  // ...
};

[changeset-bot]

🦋 Changeset detected

Latest commit: 5a13938

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 11 packages

Name	Type
@vanilla-extract/sprinkles	Patch
@vanilla-extract/css	Patch
@vanilla-extract/css-utils	Patch
@vanilla-extract/dynamic	Patch
@fixtures/sprinkles	Patch
@fixtures/features	Patch
@fixtures/low-level	Patch
@fixtures/recipes	Patch
@fixtures/themed	Patch
@fixtures/unused-modules	Patch
vanilla-extract-example-webpack-react	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[mattcompiles]

Looks good. Will need to revisit this in a few months.