i18n(ja):enforce japanese writing style

[jp-knj]

Description (required)

This PR runs textlint --fix across our documentation and mdx files using only the preset-ja-spacing rule. It configures .textlintrc.json to enforce Japanese spacing conventions, correcting full-width and half-width spaces around punctuation and between Japanese and Latin characters to align with the official Japanese writing guide.

{
  "rules": {
    "preset-ja-spacing": true
  }
}

Japanese writing guide.

https://github.com/withastro/docs/blob/b4d0c6066d3df4f6e0229c07a13fc45d4ef4c562/i18n-guides/%E6%97%A5%E6%9C%AC%E8%AA%9E.md?plain=1#L27-L45

Related issues & labels (optional)

• Closes #
• Suggested label: i18n

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Lunaria automatically ignores changes on specific PRs by adding a ignored keyword in its title. Found: i18nIgnore.

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Tracked Files

[!NOTE]
The notes below indicate what would happen if the pull request is merged when triggering status changes. Since a ignored keyword was found in the PR's title, the status changes indicated below won't be applied.

File	Note
ja/basics/astro-pages.mdx	Localization changed, will be marked as complete.
ja/guides/astro-db.mdx	Localization changed, will be marked as complete.
ja/guides/content-collections.mdx	Localization changed, will be marked as complete. 🔄️
ja/guides/deploy/aws.mdx	Localization changed, will be marked as complete.
ja/guides/deploy/google-cloud.mdx	Localization changed, will be marked as complete.
ja/guides/deploy/vercel.mdx	Localization changed, will be marked as complete.
ja/guides/ecommerce.mdx	Localization changed, will be marked as complete.
ja/guides/imports.mdx	Localization changed, will be marked as complete.
ja/guides/integrations-guide/cloudflare.mdx	Localization changed, will be marked as complete.
ja/guides/integrations-guide/db.mdx	Localization changed, will be marked as complete.
ja/guides/markdown-content.mdx	Localization changed, will be marked as complete.
ja/guides/migrate-to-astro/from-create-react-app.mdx	Localization changed, will be marked as complete.
ja/guides/migrate-to-astro/from-gatsby.mdx	Localization changed, will be marked as complete.
ja/guides/routing.mdx	Localization changed, will be marked as complete.
ja/guides/styling.mdx	Localization changed, will be marked as complete.
ja/guides/upgrade-to/v2.mdx	Localization changed, will be marked as complete.
ja/guides/view-transitions.mdx	Localization changed, will be marked as complete.
ja/install-and-setup.mdx	Localization changed, will be marked as complete.
ja/recipes/sharing-state-islands.mdx	Localization changed, will be marked as complete.
ja/reference/astro-syntax.mdx	Localization changed, will be marked as complete.
ja/reference/cli-reference.mdx	Localization changed, will be marked as complete.
ja/reference/configuration-reference.mdx	Localization changed, will be marked as complete.
ja/reference/directives-reference.mdx	Localization changed, will be marked as complete.
ja/tutorial/2-pages/2.mdx	Localization changed, will be marked as complete.
ja/tutorial/4-layouts/1.mdx	Localization changed, will be marked as complete.
ja/tutorial/6-islands/3.mdx	Localization changed, will be marked as complete.

Warnings reference

Icon	Description
🔄️	The source for this localization has been updated since the creation of this pull request, make sure all changes in the source have been applied.