chore(release): prepare DomainKit (#61)

## Summary

All bumped packages.

| Package | From | To |
| --- | --- | --- |
| `domainkit` | `0.3.1` | `0.4.0` |
| `@domainkit/react` | `0.3.1` | `0.4.0` |

## Changelogs
### `react-domain-actions.md`

<details>
<summary>Show Bumped Packages (1)</summary>

| Package | Bump |
| --- | --- |
| `npm:@domainkit/react` | minor |

</details>

#### Compose stable connected-domain actions

Compose review, cleanup, and disconnect actions into a stable
connected-provider surface with host-owned semantic tokens.
### `react-workshop-themes.md`

<details>
<summary>Show Bumped Packages (1)</summary>

| Package | Bump |
| --- | --- |
| `npm:@domainkit/react` | minor |

</details>

#### Add host theme presets

Add seven theme presets and token-complete workshop coverage for light
and dark host integrations.
### `react-lifecycle-events.md`

<details>
<summary>Show Bumped Packages (1)</summary>

| Package | Bump |
| --- | --- |
| `npm:@domainkit/react` | minor |

</details>

#### Expose structured lifecycle events

Expose structured lifecycle events from `DomainKit.Root` after
successful user-triggered mutations.

## Publish

The following packages will be published if merged:

| Package | Version | Registry |
| --- | --- | --- |
| `domainkit` | `0.4.0` | `npm` |
| `@domainkit/react` | `0.4.0` | `npm` |

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