fix: missing preview i18n

[ycs77]

Problem

I'm currently using the tutorialkit version v0.1.5, if added some i18n texts:

docs/demo/src/content/tutorial/meta.md

---
type: tutorial
mainCommand: ['npm run dev', 'Starting http server']
prepareCommands:
  - ['npm install', 'Installing dependencies']

# add the i18n texts
i18n:
  prepareEnvironmentTitleText: '啟動環境'
  previewTitleText: '預覽'
  toggleTerminalButtonText: '切換終端機'
---

The i18n will work on webcontainer starting:

But not working on webcontainer started:

PR Added

• Add missing Toggle Terminal i18n text in started <Preview>
• Add missing Preview i18n text

[stackblitz]

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[AriPerkkio]

The preview title is also configurable via previews option:

---
type: tutorial
previews:
  - title: 預覽
    port: 5173
---

But it does make sense to be able to configure the default text via i18n as well.

[ycs77]

The preview title is also configurable via previews option:

Oh, I see.

---

When I want to do i18n, I intuitively look for replaceable values ​​in the i18n options.

[Nemikolh]

Really nice work! 🌟

I think we can definitely land this. Thanks for the PR! 😃

[AriPerkkio]

We should also mention this in documentation:

tutorialkit/docs/tutorialkit.dev/src/content/docs/reference/configuration.mdx

Lines 42 to 81 in c7bad20

	```ts
	type I18nText = {
	/**
	* Template for formatting a part. Variables: ${index} and ${title}.
	*
	* @default 'Part ${index}: ${title}'
	*/
	partTemplate?: string,
	/**
	* Text of the edit page link.
	*
	* @default 'Edit this page'
	*/
	editPageText?: string
	/**
	* Text of the WebContainer link.
	*
	* @default 'Powered by WebContainers'
	*/
	webcontainerLinkText?: string,
	/**
	* Text shown when there are no previews or steps to show in the prepare environment section.
	*
	* @default 'Start WebContainer'
	*/
	startWebContainerText?: string,
	/**
	* Text shown on the call to action button to start webcontainer when boot was blocked
	* due to memory restrictions.
	*
	* @default 'No preview to run nor steps to show'
	*/
	noPreviewNorStepsText?: string,
	}
	```

[ycs77]

Wait a minute while I look at why the test failed.

[AriPerkkio]

All tests are failing. We are pinning a dependency version of transitive dependency in test cases. Another dependency just updated and doesn't support that version. There's fix in #261.

[Nemikolh]

Looks good! I think the test failure is probably unrelated to this PR.

[Nemikolh]

@ycs77 You have a lint error! Once fixed, we can merge your PR 🙌